Kaiten the Fallen (Vaerya Supplement)
From D&D Wiki
Kaiten is the only son of the Vaeryans. He is also known as the Lord of Destruction, Blight of the living, and by his disciples, the Great Shadow, and Prince of Vaerya. He draws the majority of his power from the Drift, a mystical invisible entity surrounding the world of Vaerya, and he uses it liberally in his quest to conquer Vaerya. When he spliced himself into the Drift, he became three separate divine entities bound to one will; the body, the sword, and the shadow. Each entity is capable of acting entirely on it's own, and is powerful in it's own right.