Heart of Molag Bal

The Heart of Molag Bal, is the artifact of Molag Bal, daedric prince of domination. It was created in 4E 201, when Morgoth Bauglir devoured it.

The heart contains the power to create Daedric Realms of Oblivion. That is how Molag Bal created his realm of Coldharbour. It can also create gods.

The Heart of Molag Bal created the realm of Tirashan in 4E 202 - 4E 203.

Trivia
Even though Morgoth devoured the heart, it still belonged to Molag Bal as he had the heart inside of him throughout his life. When it was removed from his body, Molag Bal became a very weak daedric prince.