Witiko!

Zagor, Chico and their trapper friend Doc Lester investigate the fate of a group of soldiers lost in the mountains during a snowstorm. The three friends discover the corpses of the soldiers partly devoured by wolves, but the Spirit with the Hatchet notices the presence of a monstrous being in the area, responsible for other tragic deaths. The Indians of a nearby village, where Zagor and his companions are hosted, call the creature "Witiko", a name they give to a mysterious demon from their legends...