By the dawn of twilight, on the orders of Count Eisen Neergaard the vargheists came.
Hundreds of the bloodthirsty beasts fell from the skies making the holy grounds tremble as they awkwardly pound the floor in which the tribe of the Holy Rok settled.
The Orruks tried to fight but they were unprepared and, for once, outnumbered. Slaughtered and devoured by the famished beasts, their settlement was reduced to rubble, everything but the solid ground that the greenskins worshiped survived,
The souls of Orruks however kept bound to their worshiped place of power were not gone, and Nagash desiring them, conjured their essence into existence, but His grasp is not total as the force of the WAAAAAGH is strong enough to waver His commands.
Led by the old tribe shamans now turned wraiths, they roam the land, terrorizing villages and fighting in Nagash armies and their kin alike.