Princess Gwenevere and the Jewel Riders

Full Circle (1x13)

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With Avalon cast in darkness, the Jewel Riders refuse to give up and return to the Friendship Ring to perform the Circle of Friendship ceremony again. Then with their jewels recharged, they enter the Wild Magic to find Merlin, led by their friend Kit the Prism Fox and other special creatures called magic gliders. Merlin reveals that the Crystal Palace itself is an Enchanted Jewel with great powers of goodness, but then Kale also finds him. While he battles Kale in the Wild Magic over the control of the key to the Jewel Box, the girls use Merlin’s Jewel box to release the magic of the Crystal Palace and restore Avalon. Lady Kale is destroyed, but to achieve this, Merlin has sacrificed his magic jewel and he cannot come back.