| Issue | #1 |
| Published | October 1972 |
| Cover Price | 0.20 USD |
| Pages | 36 |
| Editing | Roy Thomas |
| Script | Roy Thomas |
| Pencils | Gil Kane |
| Inks | Tom Palmer |
| Reprinted | in Masters of Terror (Marvel, 1975 series) #2 (September 1975) [interior, without logo] |
| Characters | Professor Conrad; Dan Kirowan; John Grimlan (flashback)(death) |
| Genre | Horror |
| Script | Roy Thomas (Adaptation); Robert E. Howard (Original Story) |
| Pencils | Gil Kane |
| Inks | Tom Palmer |
| Notes | Adapting the story by Robert E. Howard. |
| Reprinted | in Masters of Terror (Marvel, 1975 series) #2 (September 1975) |
| Script | Steve Englehart |
| Pencils | Ralph Reese |
| Inks | Ralph Reese |
| Script | Steve Skeates |
| Pencils | Jim Starlin |
| Inks | Mike Ploog |