Cherufe

Cherufe were a near-apocalyptic demonic giant from Mapuche folklore that was believed to reside in volcanoes, resembling massive humanoids made out of magma, crystal and rock - they would cause untold destruction via causing volcanic eruptions, earthquakes and other phenomena, the only way to appease them was said to be the sacrifice of a virgin, who would be thrown into the volcano in hopes of preventing the Cherufe from causing more chaos.