White Warg

White Wargs are a variety of Warg thats closely associated with the Yr-tewynneshai, the Witchborn Progeny of the White Witch of the North, the most powerful of whom are said to be capable of transforming into oversized and ferocious white furred wargs at will.

Irregardless of the factuality of this association white furred wargs tend to be larger, even more physically impressive than their forest-dwelling counterparts.
Whereas the ordinary Warg cements itself as the apex predator or whatever forest biome it inhabits white wargs prowls the snowy mountains and the rare white furred Warg that makes its way to other regions tends to excell in spite of its obvious lack of fur-based camouflage.

White Wargs are associated with Witchcraft and vile magicks and are said to be able to confound and trick unaware travellers by casting charms, twisting their minds or imitating the voices of humanoids to lead them astray before tearing them to bloody shreds with their claws.
Some myths also speak of White Wargs being able to assume humanoid shapes themselves.