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Magma flows through Grourem's body that can burn hotter than the sun, if not for the crystalline layer covering its body that cools it. The aforementioned glaze is pure Never-Melt Ice, thus it withstands such temperatures without evaporating.

It generates a powerful, freezing energy inside itself, but its body became frozen when the energy leaked out. Grourem has appeared in mythology as the creator of the land.