Knull is a fictional supervillain appearing in American comic books published by Marvel Comics, commonly in association with Venom and Carnage, and later retroactively established as an unseen enemy of Thor and the Silver Surfer, as he was behind Gorr the God Butcher's mission to hunt down and kill various deities, in addition to having come into conflict with the Silver Surfer via a temporal black hole through time. The character is depicted as an evil deity who created the weapon known as All-Black the Necrosword and the alien races known as the Klyntar/Symbiotes and Exolons. The character would go on to play a more important role in the Marvel Universe. Knull has been described as one of Marvel's most notable and powerful supervillains.[2][3][4][5][6]