Molag

Nor did the Lord of Evil stop at rebuilding his own lands, but reached also into the Horned Society to replace leaders there. … First the wild kin of these humanoids made up the bulk of the attackers, but soon enough things far worse than troll and ogre, bugbear and gnoll, were there. The masters of the Hierarchs summoned monstrous creatures from the lower planes to fortify the defense of Molag. … In answer to this, the besieging force was sent demons when they called for aid. … Then the Dukes of Hell took an interest in what was happening. They sent legions of their servants to assist the masters of the Hierarchs because their cause was one with Nerull and the rest. … The terrible battle waged day and night for a week. When it finally ended, all of the things summoned were dead or returned to their own planes. … Molag fell to the mundane armies of Iuz. …

Of the Hierarchs, not even Iuz knew for certain. … the Ten had surely managed to flee somewhere. Rumor said that they had been carried far to the south, but nothing was known beyond this tale. As the month of Sunsebb brought the chill of winter to the land, the ones who opposed Evil wondered what would follow. … [Three months pass.] The Dread and Awful Presences, the Hierarchs, made the task easy for [Iuz]. The Hierarchs reigned in veiled seclusion, hiding their human identities from their humanoid minions. Rumors that the Hierarchs were fiendish overlords arose among the humanoids of the Horned Society — rumors the Hierarchs fostered to cement their power. Iuz decided merely to make the rumors reality. In the month of Coldeven, at the height of the Blood-Moon Festival, the citadels of Molag ran red with blood as Iuz staged his coup. In less than a fortnight, the Hierarchs became creatures of mere legend and Iuz held absolute control over the Horned Society.