Ten Ways to Bring Down the Machine
An ancient blue dragon who, contrary to typical blue-dragon psychology, developed an interest in magic and human history. He studied under the vampire elder Nosferatu and assumed the identity of the arch-mage Rizahn.
He was infected with Cryptfed Worms, and attempted to use the Iron-Heart to create a new body for himself, free of the worms. When a party of adventurers stopped him, the Iron-Heart was destroyed, Rizahnanthraxsis killed, and the ancient magic that kept the Hircine trapped in a demi-plane was undone.