The Megalith has been destroyed and the new defender Rion joins the group. While the group is helping the citizens of Arboth to rebuild the city, Zad captures Kara that is brought to the Dark Realm.

Malco and Flinch have stolen the Nova stone to free Nazmul but have no success in freeing him. On the day of the equinox, the Defenders find the portal to the Dark Realm as well as objects that belonged to their parents. In the Dark Realm, Brackus betrays Kara and tries to escape first, but is left to contend with the wrath of Leizel. Back in Rados, the Defenders are attacked by the Zads. Adam stays to hold them off, shoves Rion after the others when he volunteers to help, and barricades the tunnel.

The Defenders find their new dojo, but it turns out that it needs a little work and cleanup. Erik and Mel are in the library when they find a reserver stone, which has recorded Doku and his fellow warlords in their discussion about taking over RaDos. Rion jumps the gun and causes a battle to break out when they arrive, leaving Seth poisoned at the hands of Doku. They followed Doku's rumor to a mysterious healer, with the power to almost cure anything. Except this healer, is Brackus - who now suffers from amnesia and carries a special stone to perform his miracles with. He also manages to save the Defenders in the rematch with Doku and the warlords by buying the Defenders time to escape and destroying Doku's vicious guardian. Now the Defenders have decided to tag Brackus along but only Rion trusts him, and must watch over him. Meanwhile, Malco is still trying to break open the nova stone when a few feet away, Doku and his cohorts land. He swears that next time, Brackus won't get the better of him. After they leave, Malco then begin to pound the Nova stone on a tree stump, despite Flinch's objections that it won't just crack - or will it?

Once the defenders finish clearing up their new dojo, a monstrous guardian appears. as they are about to fight it, Bo shows up and calls the thing Bo-dicon, claiming that now he is a Di-Gata Defender. Seeing Robotus, it attacks and trashes the place. they manage to return it to its stone and track Si'i, a black market guardian salesman. the defenders have to face some mutant guardians, and as the guardians are defeated Si'i crafts all their guardians together. The beast runs off after brackus, channeling their distrust over him. Rion and Mel save Brackus and Erik and Seth find a way to separate their guardians. But there is a slight chance that it will destroy their guardians instead. Rion uses ancient language of the guardians to calm them down until Seth separates them. Si'i then recognizes Brackus as a customer who ordered a guardian capable of wiping out the defenders. Seth then says: "We're watching you healer."

The Defenders must now recover the Nova Stone that Malco and Flinch stole from them, Erik is left to train Rion as Mel and Seth go on their search. Here, Cole (The villain from the Town that Time Forgot) comes and takes over a site to make an unbreakable armor. With the help of Brackus, they are able to defeat Cole (and his new Guardian, a twisted version of Anaconduit, Brackus' Guardian). However, As Anaconduit returns to Brackus, past memories as an evil warlord return to him as well, and he laughs evilly before setting off to follow Erik and Rion. As for Mel and Seth, they too meet an old friend - Zad. They both combine their spell powers to freeze him within the confines of "Twisted Frost Blast" (combination of Frost Blast and Twisted Chaos).

The Defenders once again re-unite at Port Reevus, after Rion jumps the gun and causes a fight to break loose. They are now on the search for Brim, who has been released from the Dark Realm and is imprisoned. The Defenders, with help from Brackus, defeat the creature (a twisted version of the Doomhunter) to escape safely, although Seth is almost dragged into Brim's prison. Malco and Flinch manage to escape with Brim. A Tracker stone leads them high up into the mountains, where a special crystal is required to cut open the Nova Stone; thus freeing Nazmul. Brackus, with his memories restored, temporarily ditches the Defenders (who were trapped until an avalanche) to "settle the score" with his old friends. Malco and Flinch's efforts are in vain as Nazmul is destroyed, but not before absorbing a large amount of Malco's strength. The Ethos later find his weakened body, and figure that he might be of some use.

The Ethos emissaries use their power to merge with Malco giving him a tainted color and purple sigil designs. When he is accidentally Flinch, he speaks for the first time. Meanwhile, the Defenders try to find the cause of why Rion turns dark incarnate. Melosa discovers the existence of an old monastery at Yan-Suma where the Wizards of Yan first banished the Ethos at an old quarry filled with flat stones. Given a riddle and staff from a cloaked old man, the Defenders discover the monastery with a disk from Aaron and the Warrior Henge. After defeating a caterpillar-like creature by destroying the mirrors around it, they are attacked by Malco and Flinch. Rion gets impaled by shrapnel, forcing Erik to take him back to Brackus. Seth and Mel proceed while Omnikragg holds off Malco. They discover the Orb of Ogama-Yan that, if aligned with five other Yan objects, can protect Rados from the Dark Realm. However, Malco attacks again and holds Seth above a bottomless well to get the orb. As he throws the two into the well, the monastery crumbles around them. The two survive thanks to the staff and walk into a tunnel, not knowing the old man was following them, showing that he has sharp teeth.

Erik, Rion and Brackus come upon the wreckage of the monastery where later, Seth and Mel appear to have survived the collapse. Meanwhile, Flinch orders all Zads to take care of the remaining Defenders. Mel finds an Eternity Stone, which she accidentally Malco. Brackus and Rion explain that with a Wizard's powers, they can travel through time. However, time travel is to be taken with caution as history should not be tampered with. Mel does not heed their warnings, and travels back in time to the siege of Yan-Suma and meets her grandmother. In this time, the Order of Infinis and Yin-tos troops are allied with the Wizards of Yan. However, Mel accidentally Nazmul is trying to help the Ethos and freezes the weapon meant to stop them, known as the Celestial Abyss. As a result, the future is changed and the Zad have become more pig-like, bigger and more vicious. Inside the temple, the Defenders and Brackus (somehow unaffected by the changes) find a tablet dictating how the Ethos used illusions to distract the defenses of the monastery and form a sneak attack in the underground tunnels. In the past, Mel's grandmother warned her not to inform too many people of the future, while Rion transforms and defeats the Zad. Using Eric's knowledge of time, he sends a message to Mel in the past through the use of Robotus, informing her about the ambush. Mel then informs the Wizards of the ambush, and they set up their own trap within the temple. They manage to get to the weapon and defeat the Ethos. As a result, the future is restored, the Zad in the future disappear, and a tablet showing Brackus using the weapon is put in place, to symbolize the Wizard's victory. Mel insists to her grandmother that the weapon mustn't be disassembled. She then gives Mel five stones, that will reveal the icons (the name given to the Celestial Abyss pieces) location when the time is right. Mel returns to the present using the Eternity Stone and reunites with the Defenders.

Seth and Rion have a large dispute after Brackus goes on his trip. Seth decides to leave Rion at the dojo and brings the other defenders with him to check out a distress signal. A prison break has occurred at Gatashin Prison, where the Zads spring Si'i. They kidnap Si'i so Malco can get information about modifying his Guardianizer. Malco realizes that Rion is a large threat to him, and wishes to control him by transforming him into a guardian. While the Defenders are still at Gatashin Prison, Rion responds to another distress signal, which turns out to be a trap. Flinch awaits Rion there with a modified Guardianizer and turns Rion into a mutated guardian. Rion goes berserk and wrecks a town. The Defenders return to find out about Rion's disappearance, so they traveled to the second distress signal. They find Flinch running away from Rion, the destroyer, and demand an explanation. Flinch confesses that he tricked Rion and turned him into a guardian. They need to lure Rion back to the Guardianizer, so Seth offers to be turned into a mutated guardian, however he will be under mind protection from Mel to avoid going berserk as well. He confronts Rion and forces him to calm down, also saving the village from the volcano's magma. He succeeds, and brings Rion back to the Guardianizer, after hearing Mel scream (The Ethos attempted to reclaim the Guardianizer after Flinch ran). Mixing up the stone's settings, Flinch turns Seth and Rion back to their original forms. Si'i then gets struck with falling debris after attempting to throw off Flinch. Unfortunately, Si'i falls into the lava pool and the Guardianizer's final use turns him into a mutated guardian. He then flies away, leaving the Defenders behind. Seth and Rion make up for their earlier dispute, and become allies once more.

A woman and her son run away from a creature that has Ethos sigils engraved on it. Just as it is about to attack her, a man shoots at it and the creature is absorbed into his gun. Later, Mel finds out the location of the first Icon, but the dojo's warning systems pick up a disturbance which the Defenders immediately respond to. Upon arriving, they meet the same man from earlier, named Von Fautien, and Mel recognizes another of the creatures as an Ethos war dog. It is eventually defeated. Von Faustien tells his life story to the Defenders: when the war against the Ethos was over, he was left with no family. With Ethos beasts still on the loose, he dedicated his life to hunting them down, even if it meant that others are hurt in the process. He shows them to the tomb where the first icon is located, only to find that a woman, Lady K'tash, has gotten there first and is waiting for them. While the others fight against her with little luck, Seth goes to find the Icon. When he finds it, K'tash comes to claim it. Using his visor, Seth discovers that an Ethos is inside her, as well as Von Faustien. K'tash takes the Icon and unleashes the tomb's vicious Guardian: the Desecrater. It manages to swallow Rion, but is defeated when Mel feeds it a large consumption of water, causing it to explode. Von Faustien has gone after K'tash and is traced by Seth, who puts a tracer on his vehicle. In a small town, Von Faustien threatens to use an Annihilator stone to finish K'tash off. However, the Defenders arrive and figure out that the Ethos inside him was what caused his behaviour. K'tash uses her swords to awaken the Ethos inside Von Faustien, who frees the Ethos guardians and accidentally the Annihilator. With his gun, Erik has to make the decision whether to save his friends or Von Faustien, who is about to leave with K'tash. He chooses the latter and Von Faustien kills the Ethos guardians as K'tesh flees. The Annihilator is about to explode, but Erik uses his gauntlet coupled with a

K'Tash takes one look at the Orb of Ogama-Yan before leaving. Just then, Kara sneaks in and replaces the orb with a stone in fear of traps, and leaves. Meanwhile, Mel furiously tries again with her wizard stones. When she puts them in Seth's hands, they activate, directing them to a desert. Elsewhere, Malco discovers that the orb is missing, so he seeks out Kor Yin-an, the Yan-nega wizard who tried to betray the Wizards of Yan to the Ethos and was imprisoned in a state of permanent undeath. Awakening the traitor, Malco asks for the location of the next icon in exchange for a chance at revenge against Melosa. Meanwhile, the Defenders arrive at their destination only to sink into the ground. Seth meets a young paranoid girl named Jeo and saves her from giant worms. She brings him back to her home underground, where her grandmother has the other Defenders hostage. They convince her they are not a threat. Jeo secretly shows Seth the next Icon, which she and her grandmother call the Source, the means that keeps them alive underground. Knowing that if the Ethos get it first, everything would have been wasted. While Seth distracts Jeo, the others try to take the Icon, only to be confronted by Kor Yin-an, who Melosa recognizes as the old man who gave her the staff ("Malco Redux"). Kor reveals that it was his intention to change the past through use of a projection but she stopped it and now he plans to get his revenge. With his powers, he easily deflects all of their attacks. However, Kara appears to Mel, restoring her powers so that she can use the Tracker Stones as armor against Kor Yin-an. They enter a battle to the finish. When Mel has him at the end of her spear, with everyone yelling for her to finish him, her emotions take over and Kor takes the Icon. The underground settlement begins to cave in, but Mel uses her powers to bring it to the surface, allowing Jeo and her grandmother to experience their greatest wish: To see the upper world. Seth apologizes to Jeo for no

Lady K'Tash once again plays a foul trick on the Defenders. She awakens the giant golem, Atagor-Am and implants a Champion stone to merge with Seth's right hand, hampering his abilities to cast spells and his health. The Defenders search for Brackus, who may hold the key to removing the stone. After traveling to a desert town in search of him, a merchant tells them of another healer: Adaham. They come to the place where the healer was supposed to be but finds that this magical healer is a phony and was actually Adam. He is enjoying his life of luxury with his new girl. Mel doesn't seem to care that much but wants him not to be such a coward. Meanwhile Atagor-Am traces the Defenders down and attacks them. Adam tries to run away but Mel stops him. Seth is annoyed at this and remarks that they don't need him. He tries to cast Twisted Chaos, but it ends up as a miscast and hits Mel. The stone in Seth's hand draws the giant over to him in an attack but Mel steps in front of Seth and her amulet shows. Atagor-Am refers to her as Gatanou, confusing everyone. He breaks out of his memory callback and grabs Adam. Brackus was also in town, but was meeting with Flinch, about plans to overthrow Malco's order by reclaiming the parts to the Celestial Abyss and using it against the Ethos once more. Then Brackus would assert himself as the one, true ruler of RaDos. Atagor-Am destroys the pub the two were in and Brackus sees Adam in danger. He comes running and turns the giant into sand. Brackus explains that the giant will reform and always follow then due to the stone. one time he prayed amongst the town searching for a suitable host body for his bride. The only way he can be destroyed is in the Horn of Neglos. The Defenders, Brackus and Adam head to the cave but Atagor-Am reforms and attacks them, knocking all of them of their stormers. He grabs Mel and disappears into the sand as she throws the Phase Stone. Adam yells her name as she is swallowed with the giant into the desert flo

Doku and his cohorts reactivate an ancient tower that the Wizards of Yan built after the war with the Ethos - with the help of Adam - enabling it to fly. Meanwhile, Seth is having a hard time adjusting with his rock for a hand. He and Mel try a Wizard technique to restore his hand but not success. Just then, the Dojo's detection systems discover the tower and Mel, Erik and Rion leave to stop it. However, against the other's recommendations that he stay, Seth tries on a mech arm that Erik was designing for him but didn't get the Infimatter stabilized, giving him a darker outlook. Later, the Defenders reached the Castle, on its way to Arboth. Doku detects their approach and arms the tower's defenses. Then Seth, who just came in, was tractored by Adam and taken prisoner. Doku then betrays Adam, revealing that he had been copying the tower's codes then will drain Arboth's di-gata energy, allowing him to restore his lost eye and right arm. Seth, corrupted by his prosthetic, decides to go along. Adam, realizing that the power drain will destroy Arboth forever, tries to dissuade Seth, but Seth states that he didn't owe Rados anything. Adam is furious, and yells at Seth, saying he is not fit to be a Defender, let alone their leader. Doku manages to restore his flesh and as Seth begin his restoration, Brackus breaks in, overpowering the former Lords of Infinis. Outside, Erik comes up with a plan to stop the tower - by sacrificing their guardians. While they succeed, despite Rion and Adam's initial doubts, Seth realizes what he done just to save his hand. He reverses the tower's polarity, returning his hand to rock and the energy to Arboth, as well as the other's guardians. Using his rock, Seth sabotages the towers systems and passes out. Brackus then saves him just as the tower comes crashing down. Seth admitted what wrong he had and quits the Di-Gata Defenders. Saying "I'm not fit to be a Defender".

Kara comes back, but she acts very strangely and not her normal self. She shows them the Orb of Ogama-Yan she had stolen, intent of using it to find the remaining icons, but she disregards Seth's leaving and doesn't seem to be disturbed by Brackus' change of heart. Meanwhile Seth is busy trying to survive, begging for Flat Stones (the currency in RaDos). He gets mugged for not putting up a fight against two men. He then meets a man, who then takes him into his home. He offers Seth food, drink and a place to stay. The man then takes Seth out into a garden to help him "think". But it was a test created by Aaron, the house's owner, to see if he was worthy. Seth manages to destroy the tree guardian, by grabbing a stick and lighting it with his stub arm. Seth then has dinner with Aaron, who tells Seth who he really is: An ex-assassin who worked for the Armies of Yin around the time when Seth's father was still alive. Aaron also tells Seth that he will take him to Barrier City and use a special book to restore his lost hand. Seth unwillingly agrees and rests for the night. During the night, Lady K'Tahsh pays a visit to Aaron, asking for his assistance in the tracking of Si'i, the human-guardian hybrid from We're No Guardian Angels. She and Malco believe that even in his morphed state, he would prove to be a powerful beast for the Ethos. Aaron agrees to helping them after he is done with Seth. The next day, Seth is tricked into fighting for his life instead of being healed like promised. Aaron was using Seth so that he can gain something he wants: A trophy of a Di-Gata Defender, which are hardened warriors in his opinion. Back at the Dojo, a villager from the mining town comes to the Defender's dojo and tells Rion that he has seen Seth. Because of the arguments going on between the others, Rion sets out alone to get Seth back, knowing they need him back. Rion then has a fight with the two men who had robbed Seth of his Flat Stones, and they were forced to tell him where th

A young woman named Lydia calls on the Defenders to help her when she is attacked by Amphibigors. Mel, Erik, and Adam go to help her, while Seth, Rion and Kara stay behind. While Lydia is unharmed, the Amphigors get away with her special 'Heart Stone'. She tells them that the Amphigors have her brother, and they volunteer to help her. Meanwhile, Seth tests out the new mech arm Erik has made for him, and they are suddenly attacked by the Zad. Kara defeats them with her dark new guardian and powers. Erik repairs Lydia's vehicle, but they crash when Erik and Adam (who is driving) get into a fight. Melosa is captured by Lady K'Tahsh, while Adam, Erik, and Lydia continue to pursue the Amphibigors, much to Adam's concern for Mel. Seth and Rion receive Melosa's distress call and split up. Rion goes in one direction and chases K'Tahsh, but fails when she disables his stormer with an energy whip. Adam, Erik and Lydia sneak into the Amphigor's camp to take the Heart Stone, but are interrupted when some Amphibigor warriors attack them. Seth arrives and defeats them with the new and improved mech arm, and Lydia reclaims the Heart Stone. She then decides to leave without rescuing her brother, who suddenly arrives unharmed with the Amphigor princess. He explains to Lydia that the Amphibigors were willing to share the Heart Stone's energy with their village. It turns out that Lydia is a thief, who wants the Heart Stone for her village and not the savage Amphibigors. Lydia escapes, but the Amphigors and the Defenders catch up to her. She threatens to destroy the Heart Stone with a Bakorian stone-presser. As she backs up, Lydia trips on a log and drops the stone presser, causing it to activate. Seth manages to destroy the device with Bedlam, but is struck with some of the Heart Stone's energy. The Amphibigors put the stone back in their generator, which manages to take minimal damage. Meanwhile, Kara looks for a device, and she manages to strike a deal after Brackus eavesdropped on

The human tribe places a strange necklace on Melosa, drawing Si'i towards the village. K'tahsh and her Yin-tos men wait for him, ready for tranquilization. However, K'tahsh wants Si'i to have Mel as the main course. Just then, Rion bursts in, and frees Mel. They place the necklace on the tribe's chief who is grabbed by Si'i and turned into energy for him to swallow. K'tahsh's men then subdue the human-guardian hybrid and has the entire tribe massacred. Meanwhile, Seth, Erik and Adam have just arrived back at the dojo from their Amphibigor mission, with Kara once again asking for the key to the Tomb of Al-Mortigar. After telling her off, Seth goes to her room and goes into a conversation with Kara. However, he notices in an ultimate mirror that she has no reflection. He later traps her in a forcefield and demands she reveals who she really is. "Kara" is actually the shapeshifter Kali who breaks out. Barely getting away, Seth tells Adam and Erik to get the Orb of Ogama-Yan while he tracked Kali. But things get complicated when Adam and Erik meet two Seths in the orb room. To determine which one was the real one, Erik asks them what they go to Arboth to get when Seth merged with Kragus. The one carrying the orb says pure di-gata ore but the other says the Megalith separated him and Kragus. And so, the Seth with the orb changes into a hideous shape and goes into the vents. Outside, Mel and Rion are just returning when the dojo's defenses start shooting at them; Seth had implemented a lockdown. Erik is tricked by Kali (as Adam) into revealing the shutdown codes, his old locker combo and Seth reveals where the key to the Tome is. Kali gets by Mel and Rion and has contacted her superiors. Brackus has also come to have their agreement fulfilled. But instead of giving him the orb, Kali starts to strangle him just as Si'i comes in. Worse, she had set the dojo to self-destruct. Rion and Seth begin a descent into the core but accidentally set off a trap, releasing slugs that ex

Kara is imprisoned in a mysterious jellyfish by the aquatic Mortigarians. The other Defenders arrive to free her (Adam and Erik are wearing breather masks while the others breathe thanks to their guardians merging). The Mortigarians demand the Tome of Al-mortigar in two days, at the Chi'Brek monument, otherwise they won't see Kara again. Arriving in Barrier city, separating from their guardians somehow, Seth meets with members of the Ogaman Federation to see the Tome. However, Aaron the Hunter only promised for him to see the Tome and it cannot be removed. As he leaves, an Ogaman colonel sends his men after Seth only to be caught and their uniforms stolen. Seth and Rion disguise themselves as janitors, Mel and Adam go as the Ogaman soldiers while Erik takes over the power grid. When Adam and Mel run into ID trouble, Seth and Rion put up a convincing distraction to lure away the guard. Once inside, Erik disables the power grid to the forcefield surrounding the tome, allowing Adam and Mel to try to lift but it weighs a ton. In the confusion, the soldiers shoot Adam, but he is saved by the Tome, which he is carrying. Unfortunately, this damages it beyond recovery. However, Brim's name is on the cover, so Rion contacts Brackus as to where his last location was. They return to Mount Altamor where they find it is Malco's base. Brim is frozen in a block of ice, surrounded by sigil slayer eggs. They split up; Seth and Mel retrieve the icons while the others rescue Brim. The latter run into a little trouble with the parents of the eggs but got out with ease. Elsewhere, Flinch had drugged K'tahsh and contacts Brackus to tell him that allowing the Defenders the icons was a success. However, K'tahsh had woken and was listening in on their conversation. As the Defenders make their way to the monument, Brim says there could be another way to save Kara. Arriving at the monument, both sides demand what they want. The Mortigarians call the humans "invaders" because they believe that

The Defenders respond to a distress call, only for it to be a trap made by the Ogaman Federation, led by Bo, who arrests Erik for destroying the Tome of Al-mortigar. As he was being imprisoned, the Wizard stone put him a vision, revealing the third icon, protected by a monster. Before the Defenders leave, Erik makes Adam promise to look out for Kara. Erik is put with a cellmate who thinks he's a wizard. Worse, he accidentally gets into a fight with the prison muscle, who had connections with the guards. While on washer duty, he hides from the guy, learning that he is working for Malco to force him to reveal the icon's location. He sends a pigeon with a message to the others, who tried to appeal to the judge but were rejected. He is soon attacked. Afterwards, he is sent to solitary confinement. Outside, Kara tells Adam that taking the Tome was stupid and as Defenders, they should uphold the law. When they receive Erik's message, they go to Bo, who won't help until he gets a call that there is a prison riot. While everything is happening, Erik (with two stones engraved with Mal-ra and Orn-ra) flashbacks to when Kara found his stones and tried to be like him, accidentally stinging her legs. He wakes up, finding his cellmate in his cell, taking him elsewhere. Beneath the prison, it is revealed that it is also a prison for a creature called the Rath Marak that is not of Rados, which caused a human transport to crashland long ago. According to legends, a wizard who mastered the lost sigils was able to contain it, with the cost of his life. The monster was released and ate the prison muscle with his two companions. Erik was almost eaten as well, but the Defenders arrive and Kara saves him. However, every time the creature was hit, it gets bigger and stronger, it even withstood the Nova Stone. With no choice left, Erik uses the two stones to drain its energy, but the power was too much. Kara tries to help Adam when he is stuck under a large chunk of stone, but he insists th

Erik travels to an ancient mystic monument with hopes of bringing Kara back. The other Defenders storm Mt. Froza, but find that it has been abandoned. There Rion yells at Adam for sending Kara to her demise. Adam insists it was not his fault. Meanwhile Malco, K'Tash, and Flinch, with Si'i and a random young woman, arrive at an abandoned cave, where the girl is sacrificed with an Ethos spell to create a floating base. At Mt. Froza, Rion feels the effects of the spell and transforms, attacking Adam in rage. Adam flees, sporting a serious injury on his arm. Rion leaves, assumedly to finish the job. Seth and Mel contact Brackus, who meets them in Jobu, giving them a special amulet that should force Rion to revert to normal. Meanwhile, Erik is attacked by a creature, Marak, of the same race as Tzur. He falls into a volcano, but realises that it is a test of faith, and jumps into the lava, an illusion. Adam takes refuge to treat his wound, and then sets off to find Erik in hopes of getting him to tell the others it was not his fault. Erik undergoes another test, being attacked by swamp creatures. Remembering the last test, he willingly lets the creatures get him. Marak leads him to a building where he says that Kara awaits him. Mel, Seth, and Brackus successfully force Rion out of his transformed state, but are attacked by Si'i, who'd escaped from Malco's base. Flinch and K'Tash take him out, and are unknowingly followed to the new base, which, unfortunately, is capable of teleporting, and impossible to track. Erik sees Kara in the room, but is unable to touch her. Kara tells him that what she had done was what had to be done, and reminds him not to forget his duty to Rados, before vanishing. Adam shows up, and begs Erik to clear him with the others, but Erik, also believing him responsible, attacks. Adam insists that all he'd done was tell Kara that Erik needed more help than him. Erik doesn't believe him, and continues fighting, saying that he'd rather have died instead

A number of children have recently gone disappearing. The Defenders are busy searching when Erik finds an orb that's made of a metal not from Rados. Rion suggests he be bait, but he is captured. A crazed man, known as the Professor, is searching for evidence that humans are descendants of interstellar travelers. But in the mines is a virus that is harmful to the fully grown, but children are immune to said virus, which is why he's making THEM work. He sends Rion down through the hole to see what's down there, and Rion discovers an otherworldly ship. Meanwhile, the orb Erik had found suddenly begins to head towards the dig site, with the Defenders close behind. When they arrive, the professor, the children, and a few guards go down into the hole, while the other guards try (though unsuccessfully) to hold off Seth, Mel, and Erik. The Professor leaves the children with the guards while he inspects the ship, telling the guards to destroy them if the Defenders show up. But the Defenders make quick work of them, and Seth and Rion follow the Professor while Mel and Erik get the children to safety. The Professor successfully traps Seth and Rion, and recognizing the orb as the ship's power cell, plugs it in, activating a recorded warning left by the ship's captain Iridian. She warns any trespassers that on board is the Totenkof virus, which they'd tried to escape on her homerealm, and that she was forced to land or RaDos as the Wrath Norak killed several of her crew members. The virus is only effective when airborne, and should not be released, as there is enough to destroy the entire realm. Although Iridian bears no resemblance to humans, the Professor hypothesizes that her people evolved from exposure to the sun. Seth and Rion escape as the ship takes off, but Rion pushes Seth into an escape pod, taking on the Professor alone. In the duel, the protective suit that kept the Professor safe from the virus was broken, killing him. Rion manages to crash the ship into the lake,

Mel has a nightmare where Kor attacks her. She wakes up and the others comfort her. The Wizard stones soon surround Rion, giving them the location of the fourth Icon—at the Pinnacle. Erik stays behind to monitor, carve new stones and make dinner. The others make it to the Pinnacle but Kor had also arrived. In the ensuring fight, where the undead is invincible, Rion encounters his "other" self. Though he conquers it, Kor takes the Icon. He tells Rion to relay to Mel to meet with him at the Spell Zone, in a courthouse. Meanwhile, Brackus meets with K'tash, using a stone to control her and release the Ethos inside. He is protected through use of a spell, which prevents the Ethos from touching him. He gives an offer to the Ethos—control of the Celestial Abyss and sole consumption of all Di-Gata energy in Rados; the Ethos agrees. Back at the Pinnacle, the Defenders stumble upon a recording of Kor's trial. The Wizards punished him with the most barbaric and brutal punishment ever—Arkham Mal Rash, the most barbaric punishment that hasn't been used for centuries, only to be used when someone harms a fellow Wizard. Knowing that Rados lies in the balance and as the last Wizard, she holds the responsibility, Mel accepts the challenge. She meets with Kor, who tortures her a few times before they enter a duel to the death a second time. Kor was very mad that the Wizards didn't hear him, blaming them for not making peace with the Ethos, saying he did not have authorization and that he was trying to save himself. Mel knows that if he is to be freed, she must end it. So, she used her powers to throb her spear right through Kor, destroying him. She takes the four Icons just as the Courthouse collapsed. Meanwhile, two kids Erik encountered at the mine (Azura and her brother) where the ship was buried, broke into the dojo, claiming they want to be trained as Defenders. After a futile chase all around, Erik accepts them, but not before having them clean the dishes. Brackus, who j

K'tahsh finds out where the four Icons are—in possession of the Defenders (which they took from defeating Kor Yin'an). Meanwhile, Brackus is busy training the kids in brutal combat but they quickly best him. That's when Seth, Mel and Rion return. Reluctantly, Rion and Seth decide to train the kids. Erik continued on his carving of the Lost Sigils. But the materials he used from the Dojo cannot withstand the process. He goes to collect Dakocite from the mining town he previously saved. Brackus meets a small pet of the kids' which sprays a pink toxin in his face. Mel manages to clear it away with her powers, but the toxin makes Brackus fall in love with her. At the Ethos Citadel, Malco is tirelessly trying to subdue Si'i, the humanoid guardian. Flinch calls Brackus, who is still infatuated at being a Sigil Slayer breeder. In his confused state, Brackus tells Flinch to make a necklace of Sigil Slayer eyes. Eventually, Rion gets sprayed and falls in love with Mel, causing a mixed up love triangle. Seth then puts hard pressure on the kids, having them carry heavy objects up a mountain. After they've completed their task, Seth asks them why they want to be Defenders. Their response was they want to protect the Realm very much. Mel calls Erik on how to reverse the "love state": Dakocite Dust. The Ethos emissaries in Malco decide to personally take down Si'i. They then murmur their plans to continue using Malco's body until their plan is complete. Afterwards, the body will be destroyed. Managing to get away, Malco tells Flinch to run and send for help, just as the Ethos take over him. Meanwhile, K'tash breaks into the dojo, under the cover of the confusion that the creature's toxin has caused, but can't find the icons. Mel accidentally gets sprayed, looks in the mirror and falls in love with herself. K'tash falls under the impression that Brackus is making a convincing distraction, with no knowledge of what had transpired here. Seth enters the room and breaks the confu

Brackus continuously trains Roodu and Azura with a Sigil seeker, ignoring their pleas to try casting real stones. When he leaves them, they seem to be hiding something. Meanwhile, the Defenders discover that the Von Faustien's Ethos parasite is missing from the vault. Just then, Maia (whose magical vision has changed, allowing her to see the future) arrives with a whole group of kids wanting to be Defenders. Suspicious, Seth interrogates Roodu and Azura about the vault but they claim they don't know anything. When he leaves, it was revealed that Roodu took Brackus' Guardian stone. Seth then suspects Brackus and has Mel check his tent. Inside, she finds a locket with a picture of a much younger Brackus and a woman who looks like K'tahsh named Torash. She then finds a recorder detailing that Brackus hopes to earn everyone's trust. She brings the recording to Seth, who is in the process of strangling Brackus, just as the Ethos container falls from Maia. Suspicions change and Seth banishes all the kids from the dojo after discovering that Roodu and Azura stole Dark Viper and caused it to go on a rampage. Brackus offers to take the children home, but instead he gives them a map, offering them a chance to train under him in secret. He goes his own way on his stormer. When he's alone, he contacts Flinch, who is in charge of caring for the sigil slayers, but he had bred them to be controlled by an unspecified crystal. But once the conversation is over, he is attacked by K'tahsh, who was eavesdropping on the communication. While fighting, Brackus tries to explain that he was trying to barter for K'Tahsh's life so they could rule Rados when the maelstrom is over; she relents. He sarcastically remarks that he should have married her when he had the chance—if he had not left her to the mercy of the Ethos. Back at the dojo, the Defenders have left no stone unturned in search of the Ethos, and come to the conclusion that the Ethos parasite perished due to a lack of a host. B

The fifth icon is revealed to Rion in a dream. He leads the defenders to a place where, weird people control a creature in an attack against the defenders. Erik falls behind, and as Seth rushes to help he is taken by the spider and about to be eaten, before a strange sphere falls out of his pocket. The weird people cease and worship the great relic of The Creator.Meanwhile, at the dojo Maia and Roodu are employed by Brackus to get the icons and on the way, meet Darr. Maia has a vision, in which Brackus is destroyed by Seth. Back with the defenders,Seth claims that they are leading them to the wizard tower, but it actually turns out to be the wizard tower. It takes off to another realm where their Di-Gata stones are dead, and the same virus seen in The Lost Children is lurking. The defenders are affected by this virus as it turns them into RaDos primordials. The weird people are destroyed by Doku in the wizard tower. Seth and the others leap onto the wizard tower as it takes off, but Doku grabs onto Seth wanting the fifth icon. Doku falls to his doom. Back in RaDos, the defenders, all except Rion, change back to normal. They find that Brackus has been attacked by K'Tash and Malco and they now have the icons. As they rush to help, Brackus thinks Seth is Adam and reveals to them that he was in the making of betraying them. Seth pulls out the weapon from his chest and Maia, Roodu and Darr return, running away thinking that Seth destroyed Brackus. Mel tells them that it doesn't matter, because right now the only thing standing between Malco and destroying RaDos is the fifth icon, currently in her possession.

Malco uses the Celestial Abyss to open a portal to the Dark Realm. Rion comes to stop him, only to be laughed at for the restraining sigil on his forehead prevents him from using his full power and is simply blasted away. Rion then wakes up looked in the mirror, still in his prime Radosion form. Angry, he shatters it. Meanwhile, the others are erecting defenses around the dojo. Seth goes out for a recon mission. While Erik is digging trenches, Rion comes, demanding that they remove the restrainer, but Erik doesn't know how. Furious, Rion runs off, not knowing that Erik picked up a massive amount of sigil energy emanating from him. After a talk with Mel, she uses her powers to find out what's wrong. Then suddenly, an Ethos comes out of him. After a small battle, Rion comes to his senses and encases the Ethos in an orb, which gets electrified. Going for the next step, they decide to restore his original form. At the Ethos citadel, K'tash rides on Si'i, ordered by Malco to retrieving the last Icon. K'tash then leads a legion of sigil slayers towards the dojo. Their movement is spotted by Seth but he is ambushed by a few strays. He defeats one, but gets detached from his mech arm. He is saved at the last moment by Maia, who warns him that the others are in danger. At the dojo, Erik (in carver robes), prepares to use an intimidating-looking machine on Rion but something goes wrong and another ethos comes out of him. The second Ethos explains that Rion is formed of Ethos essence and only he can stop the others. Erik defeats the Ethos using the lost Sigil stones. Once the Ethos is gone, Rion is restored to his normal. But an attack from the sigil slayers disrupts things. They bypass the wall and are held back by auto defenses. Seth returns just in time and Erik reattached his mech arm. As they prepare for battle, Rion leaves to face Malco alone. But things turns for the worse when a fleet of Mortagarian airships join forces with the slayers.

Rion arrives at the Ethos citadel, his arrival seen by Maia. He tries to fight Malco but the giant simply awakens his Ethos side. He gives the last Icon, completing the Celestial Abyss. But Malco had no intention of freeing his brothers, just to simply feed on their energy and become a god. Meanwhile, at the dojo, the Mortagarians demand the Icons but Seth said that Rion took them. The leader informs him that Rion is a failed Wizard experiment meant to use Ethos-created warriors. Erik accepts that humans did invade Rados and offers the Mortagarians his Primordial stones as a peace offering and asks their help in defeating the sigil slayers, so they could build a new future together. The leader is pleased with such an act and allows Erik to use the stones in battle. But as the fight goes on, the Defenders and Mortagarians are overwhelmed and forced to fall back. Adam comes in and saves Mel, who was pinned down by rubble. When they try to retreat back to the dojo, their path is blocked by K'tash and Si'i. Erik uses the Primordial stones to seal K'tash beneath the earth, causing the slayers to go wild. The Mortagarians remain to deal with the rest of the slayers while the Defenders follow Si'i to Malco. Malco becomes alerted to their approach and sends Rion to stop them. With his skills, he nearly kills them but Adam uses the Phase Stone to remove the restraining sigil, bringing about his beastly form. His Ethos side tries to regain control but Rion returns to normal. Together, they go to face Malco. But Rion's encasement attack is simply repelled, throwing them against the wall. Malco prepares to destroy them only for his true personality to expel the Ethos from him. Angered at his betrayal, they kill him. Rion transforms into his other form and takes out two Ethos but the remaining one subdues, only to be attacked by Si'i, whom Rion was able to call in the ancient language. The Ethos simply turned him back to human and threw him out of the citadel. Absorbing tons