The Story of Jewel Land's Worst Pet Who Multiplied Her Magic by 40 in 10 Minutes and Restored the Jewel Castle: An unexpected visit from Opal causes the Jewelpets to undergo rigorous training to help restore the Jewel Castle. Jewel Castle, Magical Training Camp from Hell! After failing to restore the Jewel Castle, the Jewelpets undergo rigorous training. Meanwhile, Opal, Airi, and Laura speculate on a mural which holds a prophecy.