In January 1974, he left DC to work at Warren Publishing, for whose black-and-white horror-comics magazines he produced a series of original work as well as short story adaptations. As with "BadTime Stories", Wrightson experimented with different media in these black-and-white tales: Edgar Allan Poe's "The Black Cat" featured intricate pen-and-ink work which stood in direct contrast with his brush-dominated "Swamp Thing" panels. "Jenifer", scripted by Bruce Jones, was atmospherically rendered with gray markers. "The Pepper Lake Monster" was a synthesis of brush and pen-and-ink, whereas H.P. Lovecraft's "Cool Air" was a foray into duotone paper. "Nightfall" was an exercise in ink wash. "Clarice" was also drawn in pen, brush, and ink, and with ink wash.