Eydis can be described as an evil vǫlva, making sacrifices for Níðhöggr, the serpent that gnaws on the world tree, Yggdrasil.
A character design based on the description of the vǫlva/seer/shaman from Norse Mythology, her looks inspired by the description of the vǫlva Þórbjǫrgr lítilvǫlva from the Saga of Eric the Red.