Super Friends

Swamp of the Living Dead (3x20)

Air date: Nov 11, 1978

The Legion of Doom makes a deal with an old swamp sorceress and her demon - An equivalent amount of the power of good in exchange for an equivalent amount of the power of evil. In order to gain that power of evil, the Legion decides to give the demon the Super Friends as the power of good. The Super Friends are captured and put to sleep in coffins. However in the Legion of Doom's greed for more power, they capture the demon believing he would give them an infinite source of power and pays the price for it when he uses his powers to escape. Offended by this, he summons his legion of zombies to attack them. This forces the Legion of Doom to free the captive Super Friends and the old swamp sorceress tells them of a tactic to defeat the zombies in exchange for letting the Legion of Doom go. However, feeling the balance of power must be balanced for her performing a positive spell, she turns on both factions and reveals that she and the entity were the same being.