10 Comic Book Supervillains Who Created Their Own Worst Enemy

Sometimes the consequences of a villain's actions are observed pretty quickly, as with the aforementioned rivalry between Ultimate Peter Parker and Norman Osborn. Other times the full ramifications take a bit longer to manifest - like with Joe Chill killing Bruce Wayne's parents.

And then there's Knull, an eldritch being of pure darkness who had to wait billions of years to receive his just desserts after one of his symbiote creations finally stood up against him - Venom.

This entry is a bit of a double whammy when you think about it, as there'd be no Venom without Spider-Man, and no Venom without Knull. So you have a villain who created a villain, who was then a hero, and then a villain again, and then a sort of anti-hero, and then a villain, and then finally a hero. (You're liable to get a headache the longer you think about it.)

Either way, long story short, Knull is a being who existed before the Big Bang. As the god of darkness, he was naturally opposed to the light and took particular grievance with the celestials who began exploring the cosmos. As a result, he forged the first ever symbiote - All-Black, a sword comprised of pure darkness that Knull used to decapitate one of the intruders.

But time would pass, and after encountering Thor and learning how ignoble their master was, the symbiotes created by Knull rebelled, entrapping the god on a planet and adopting the name Klyntar.

One such symbiote, Venom, would embark on its own redemptive journey after being abandoned by Spider-Man and then corrupted by Eddie Brock. After adopting a number of hosts, Venom returned to Eddie and the two fought Knull together, using Mjolnir and the Silver Surfer's cosmic board to kill him once and for all.