Winterhorn

The Winterhorn is an Emblem Heartless that appears in Kingdom Hearts III.

Kingdom Hearts III
After other Heartless were slain by Sora, Donald, and Goofy to defend Queen Elsa, a Winterhorn attacked a sneak attack from above. However, Elsa managed to destroy it with a blast of ice magic.

Design
A Winterhorn Heartless takes in a form of a young reindeer calf. Its horn is composed of ice, hence, its name.