Kthozloth

The Cunning Magician, Kthozoloth, The Watery Fool, a Yagathian god of magic, illusions, and death who was vanquished by the warrior spirits from the Outer Dimensions after he declared war on the Astral Masters.

Mythology
"'The many wicked and sinful deeds of Kthozoloth are known throughout the Universe as he casts spells and incantations to raise the dead and do his bidding...He did was evil in the eyes of the Astral Masters by teaching mortals about the forbidden knowledge and dark things...'"

He is said to have been a necromancer and magician of the Yagathian Empire until he was banished from the world of the living for summoning an army of dead warriors.

Kthozloth made his presence known for the Demon Lord Qalarthoth and proved to be an important part of the Dark Abyss and became a leader of many legions of abyss fiends.

There is one legend that states he can swim in the depths of the deepest ocean and uses magic as means to conjure up dead spirits that were long forgotten.

When he is finished he would come back up to the surface and watch them try to escape from the watery graves with pleasure.