The Contest of the Champions
In some moment, the Grandmaster abducted many heroes and villains of the Earth (with physical power) and brought them to a theater on another planet, forcing them to face the Champion for their freedom. After defeating the Abomination, Champion faced Thor, who could not beat the Elder, when Hulk was released from his prison and began to fight against Thing (since he was only interested in defeating to him). The Grandmaster bet his Infinity Gem, if the Champion can defeat to Hulk, but Hulk was not interested and hit the Champion.
Then Ben took the opportunity to grab Champion from behind, forcing Hulk to beat Champion to get to the Thing, knocking him out and forcing the Grandmaster to return all the champions back to Earth.
Powers and Abilities
Seemingly, those of Tryco Slatterus of Earth-616.