Chaefka
From Halopedia, the Halo wiki
The Arctic Beast is a mammalian creature that appeared in the concept art for Halo Wars.
It is furry and white with large horns curving around its head. It looks vaguely similar and comparable to the Wampa from The Empire Strikes Back and the Reek in Attack of the Clones in Star Wars.
Appearances
Arctic Beasts were meant to appear in Halo Wars but were cut from the game.