Normally yetis seek to protect the world rather than hunt its other civilized denizens. They do so by lairing near eldritch portals that form links between the Material Plane and other, much stranger dimensions of reality. From within these snow-covered arches and ancient stone doorways, aliens, living nightmares, fiends, and worse can emerge through dimensional networks into the world. Yetis who guard these portals sometimes succumb to these horrors and are corrupted, taking on the bloodthirsty urges and horrific behaviors of the very monsters they strive to protect the world against. Yetis who manifest such violent tendencies are driven out of their clan and forced to wander the mountaintops alone, thus giving rise to the myth of the legendary abominable snowman. Forced to fend for themselves, these exiled yetis often fully embrace the corrupting elements that caused their exile in the first place, growing more powerful and more deadly as a result. The most vile of these yetis turn to cannibalism, not out of need, but out of a sheer joy at the terror they inflict upon their kin.