The Snow Mane is an invisible magical rat-like creature that once lived in the Frozen Reaches.
Background[]
The snow mane is a unique creature in the ice world. It is swift of foot, and packs a tremendous bite. It was not known what this creature looks like as it’s invisible. It’s also unknown what kind of magic empowers this beast.
Connor used a Potion of Reveal to see it. It appeared to be a giant rat. Its also unknown what kind of magic empowered the beast. Connor defeated the beast in order to get the pond where the Flame Sword was located.
Behind the scenes[]
The snow mane can be killed while its invisible, though it makes it more difficult.
The KQ8 hintbook also calls this a "Snow Rat".