Zarrko, the Tomorrow Man is a supervillain appearing in American comic books published by Marvel Comics. The character is most commonly associated with Thor.

Loki Laufeyson is a character appearing in American comic books published by Marvel Comics. Created by writer Stan Lee, scripter Larry Lieber, and penciller Jack Kirby, he is based on the Norse mythological deity of the same name. Although a version of Loki debuted in Venus #6, his characterization as the adoptive brother and nemesis of the superhero Thor was only introduced with the version of the character that debuted in Journey into Mystery #85 and which has persisted to the modern age.