Evil Gods

Evil Gods are high-level monsters that inhabit the barren frostland of Jotunheim. There are two types of Evil Gods, beast-types and humanoid-types.

Background
They're first mentioned when Kirito hands over money to the Sylph and Cait Sith Lords since that's then only way to get the amount of money Kirito had. After Leafa and Kirito are caught by a trap do both types make an actual appearance, They are a key point in Caliber Side Story.