The Black Mass

The Black Mass was a being from the show Samurai Jack. It was anon-sapient life form that roamed outer space, and is presumed to have been an organic manifestation of pure evil, perhaps even the source of evil itself. Before it could fulfill its purpose, which was likely to devour the entire creation, three gods Odin, Ra, and Rama arrived to exterminate this great evil. The surviving remnant of the Black Mass which escaped the confrontation eventually landed on Earth and would later spawn the demonic sorcerer Aku.