Marcus is a human male with inhumanly large testicles. He can be found by exploring the desert, carting his massive nuts around in a wheelbarrow. He is accompanied by a succubus, who is using him for his cum. He will ask the Champion for helping making the decision to become a demon or stay a human. Either answer will result in the succubus giving the Champion bottles of Succubi's Delight, either as a reward for their help or as an attempt to corrupt them.