Fimbul
The Endless Winter
Fimbul is the vengeful spirit of a fallen god, known as the Endless Winter. The necromancer Kriomein invited spirits to compete for the body of Glace, the first Champion of Ice; Fimbul won and possessed her remains. Its frost threatens to engulf Lore, leaving living beings frozen between life and death. After the confrontation, Mueran finds that Fimbul's remnants have scattered on Lore's winter winds.
Sources
Warlic at Glace's Tomb · Mueran's quests · Endless Winter · Fimbulventr Witch Locks