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>Its form may be a reference to Norse mythology guardians of the Yggdrasil tree: a bird-like creature that protects the top of the tree, this may be Yveltal, a deer-like creature that protects the soil and trunk of the tree, this may be Xerneas, and a snake-like creature that protects the underworld below the tree. If this is right then there might be a snake-like legendary Pokémon to go with Xerneas and Yveltal. It may also be based off a wyvern.
