What writer-artist created the character who is trying to amass Infinity Stones in Avengers: Infinity War?
Avengers: Infinity War:  In "Avengers: Infinity War", the Avengers join forces with the Guardians of the Galaxy to confront Thanos, who is trying to amass the Infinity Stones. Thanos: Thanos ( , ) is a fictional supervillain appearing in American comic books published by Marvel Comics. Thanos:  Created by writer Mike Friedrich and writer-artist Jim Starlin, the character first appeared in "Iron Man" #55 (cover dated Feb. 1973).
Jim Starlin