Skaar was sent through a dimensional portal, by Annihilus, to battle and defeat the Hulk. During an intense fight between the two, Red shows up and renders Skaar temporarily unconscious with a large missile, and he is then carried back to Hulk's Gamma Base, where they place him inside an anti-gravity holding chamber.
Unfortunately for S.M.A.S.H., Skaar notices a crack in the chamber and uses a Thunder Clap to break free and steal a gamma powered laser cannon. The cannon is used to stabilize the dimensional portal over Vista Verde, effectively allowing Annihilus to send through an army of bugs and begin his invasion of Earth. As Hulk and Red try to fight the insects, and hold off the invasion, Rick Jones comes to the rescue with the Sandblaster. When he accidentally overloads its gamma core, the resulting explosion destabilizes the portal and thwarts Annihilus' plans, but not before Skaar and Red and are carried through the closing portal and into the Negative Zone.
