Something that's born for my own amusement and fun but somehow I ended up working on it far more than I expected.
Jormag is from Guild Wars 2, and is inspired by Zhengyi Wang's promotional art for the Icebrood Saga
Elsa is from Frozen 2
Jack Frost from Rise of the Guardians / Guardians of Childhood
and the Night King is from Game of Thrones