Question: Who was an enemy of the fictional character worked on by Esad T. Ribic that was the adoptive brother of Thor?
Sentence (from "Esad Ribić"): Esad T. Ribić (born 10 November 1972) is a Croatian comic book artist, known for his work on various titles for Marvel Comics, including "Loki", "Silver Surfer: Requiem", "Sub-Mariner: The Depths" and the 2015 "Secret Wars".
Relevant evidence: Yes