Blastaar is a character appearing in American comic books published by Marvel Comics. Created by Stan Lee and Jack Kirby, the character first appeared in Fantastic Four #62. Blastaar is an opponent of the Fantastic Four and lives in the Negative Zone. He is also an enemy of Annihilus, another Fantastic Four villain.

Annihilus is a supervillain appearing in American comic books published by Marvel Comics, primarily as an adversary to the Fantastic Four. The character debuted in Fantastic Four Annual #6, which was published in November 1968. Annihilus was created by writer Stan Lee and artist Jack Kirby, and was notably featured in the "Annihilation" event.