A Vision of the Beasts #3: The Brotherhood of Diablo by Jack Lovejoy

On an Earth blighted and changed beyong all recognition by nuclear holocaust, the savage mutants of the Brotherhood of Diablo torture and enslave all they meet. One one small band of humans has resisted; lead by Derek the Hunter, the wanter the blasted waste, searching for a safe home. But the time for a final battle approaches. Angered by this defiance of their might, the rulers of Diablo hunger for the blood of Derek the Hunter. And for his part, the Hunter has determined that he will free his people from the dreadful threat of Diablo forever, even if he must journey to the very core of their king, to the Rath of Diablo itself, to do it.