Tanagabelsamu is an alien thing from outside the Cosmos. He is part of the mysterious threat mentioned by First Sorcerer Kaemy, and although his plans are unknown, it is sure that he and his fellow aliens mean bad things for the Cosmos.
Tanagabelsamu looks like a gaunt humanoid clad in tight black leather robes. His hands end in long claws that look to have been stripped of skinned, revealing blood-red flesh beneath. He has a bird skull for a head. The beak is filled with fangs, and meat and eyeballs are visible in the eyesockets.
Tanagabelsamu has appeared before the crew of the Starchaser twice. Both times he appeared only as an illusion, but was able to use a mind blast power of some sort on them. He then departed, leaving behind a swarm of fell taints. Tanagabelsamu recently commanded the Starchaser crew to bring Leraque to “angel’s monument,” but what this monument could be is as yet unknown.