Venom: Everything You Need To Know About Absolute Carnage

Knull was born before the universe and spent his days sleeping in the void, until he was rudely awakened by the coming of the Celestials and their inconsiderate habit of creating new species. Being entirely of sound mind, Knull came to the conclusion that the only course of action is to create a sword from the void and decapitate the nearest Celestial, creating a forge.

He decided that he rather liked the universe as it was before all this 'life' business started, so began to develop weapons. However, in his unrefined method, he ended up giving these weapons weaknesses that stay with them to this day, fire and sound.

The dark god goes on a universe-wide symbiote invasion to create a huge hive mind, with the help of a dragon he creates, until such a time where his sword betrays him and he comes up against Thor on Earth. He is defeated, severing the connection between Knull and his creations. The Klyntar then rebel and trap Knull in a huge cage made up of millions of symbiotes.

Knull still holds sway over symbiotes, allowing him to possess them (warping their faces into a spiral pattern) and bestowing new powers onto them, such as altering body chemicals and badass wings.