Uldyssian

The demons of the Burning Hells have the Greater and Lesser Evils, but those seven dark eminences agreed on almost nothing, and as a result, the Hells have almost never been united to a singular purpose.

Despite the presence of Uldyssian and his followers, it was merely a chapter, a small one in a saga that links us from the creation of the world of Sanctuary to the present day. One cannot discuss the Sin War without discussing nephalem, for in a way, the nephalem are far more important to the cosmos than Sanctuary, Inarius or Lilith. More important than the Archangels or Prime Evils.