Annihilus

Annihilus was the ruler of the Negative Zone.

History
After countless efforts, Annihilus managed to open a wormhole above Vista Verde with intentions to invade Earth and strip it of its natural resources. Despite his refusal to fight the Hulk, he sent Skaar through the portal to attack him. Eventually Skaar managed to free Annihilus from his inter-dimensional, and sent his bugs to attack the Hulks. However, the blast from the Gamma Core caused the portal to close, but not before Annihilus' bugs to capture Red Hulk and Skaar.