4th grade - repost story: cutting it short... Wave a water spirit finds a crystal summon which are crystals the practically soul / existence of a spirit trapped within a crystal that is summon-able. Vortex the one holding the bear found a unhappy spirit who died and tried to fix things. However in a fault vortex died and was only able to trap the spirit in a red gem which wave found / summoned. Since wave isn't as strong as vortex the spirit lost his head in the process of all the trauma / his gem being cracked.