In the early 70s, the Marvel Monster and Horror line expanded not only with the classic characters (Dracula, Werewolf by Night, Frankenstein, etc) but with anthology titles as well. One of them was Chamber of Chills, which strangely enough was the title of a Harvey Horror comic back in the early 1950s.
The cover to the fear fraught first issue was by Gil Kane and Tom Palmer. The big selling point for this one (besides the giant red dragon) was the adaption of Harlan Ellison's Delusion for a Dragon Slayer. The adaption was by Gerry Conway and Craig Russell, but I read somewhere that Ellison wasn't happy with it. Harlan, not happy with an adaption of his work? Well, you could probably say that about anything of his that Marvel touched.
I think the cover of issue #2 was more effective, featuring a vampire about to attack someone in a cabin. Marvel was once again adapting a short story by another writer, Robert E. Howard, who readers already knew from Conan the Barbarian. This story was adapted by Roy Thomas (naturally) and Gil Kane. Nuff Said!