Fantastic Four #91

In "The Thing — Enslaved!", the mighty Ben Grimm finds himself captured and forced into servitude on the Skrull homeworld, his strength turned against him in brutal gladiatorial games. With the Fantastic Four scattered and their teammate missing, the team must unravel the mystery of his disappearance before it's too late. Written by Stan Lee and brought to life with dynamic art by Jack Kirby and inks by Joe Sinnott, this 1969 classic features a cover by Kirby and Sinnott that captures the tension and scale of the alien ordeal.