Eric Simon Payne thought he found purpose in life when he accepted an offer to join a mysterious cult and underwent an initiation to become a "reaper" … until discovering the cult's plan to call forth a long-dead race of demons, that is. Equipped with a magical sword and cloak, he took the name Devil-Slayer and eagerly set out to stop the forces of evil (Marvel Spotlight #33).
But for all his good intentions, Devil-Slayer had a hard time as a hero.
On his first adventure, Devil-Slayer picked a fight with Deathlok, mistaking the cybernetic crimefighter for a demon.
Ironically, in the recap of his origin story, Devil-Slayer thought that his own self-described "eerie sixth sense" was one of the reasons the demonic cult originally recruited him.
Marvel Spotlight. Vol. 1. No. 33. April 1977. "(Don't Fear) The Reaper!" [Dedicated with appreciation to the Blue Öyster Cult.] David Anthony Kraft (author), Rick Buckler, Mike Masser, Arvell Jones, Klaus Janson (artists), Howard Bender (letterer), Don Warfield (colorist), Beth Bleckley (computer type), Archie Goodwin (editor).
Interestingly, as noted above, credits for Deathlok's "computer type" thoughts were separate from the letterer credits.