Klorr

Klorr was a powerful Arcane Researcher, walker of the Planes, and clockmaker. He created the Timepiece of Klorr, Hourglass of Klorr, Moondial of Klorr, and the Water Clock of Klorr.

Unfortunately, his obsession with clockwork devices proved to be his undoing. He was consumed by his inability to synchronize and control his heart like the rest of his clockwork creations. After crossing the planes of existence and making evil pacts, Klorr crafted his Timepiece and gained immortality of a sort. However, the Timepiece required regular murder. Although he resisted at first, he eventually became corrupted and gave in. Eventually his time ran out when he botched a murder and the timepiece claimed his life.

Data from the Ravenloft Catalogue

		Forbidden Lore: Oaths of Evil Forged of Darkness
		Ravenloft Campaign Setting:Realm of Terror - pp135-136 Forbidden Lore: Oaths of Evil - p27 Forged of Darkness - p43