The Blob is a fictional character appearing in American comic books published by Marvel Comics. The character is usually depicted as an adversary of the X-Men. A mutant originally depicted as a morbidly obese circus freak, the Blob claims to be immovable when he so desires. He possesses an extreme amount of pliable body mass, which grants him superhuman strength. Possessing the demeanor of a bully, he mostly uses his powers for petty crime on his own, and as a member of the Brotherhood of Mutants and Freedom Force.

The Brotherhood of Mutants is a fictional group of mutants appearing in American comic books published by Marvel Comics. The Brotherhood are among the chief adversaries of the X-Men.