| Issue | #21 |
| Published | February 1968 |
| Cover Price | 0.12 USD |
| Pages | 36 |
| Editing | Chase Craig |
| Notes | Cover art credits from Magnus, Robot Fighter Archives (Dark Horse, 2004 series) #3 ([September] 2006). |
| Characters | Magnus; a black magic robot |
| Genre | superhero; science fiction |
| Pencils | Vic Prezio (painting) |
| Inks | Vic Prezio (painting) |
| Colors | Vic Prezio (painting) |
| Letters | typeset |
| Notes | Cover art credits from Magnus, Robot Fighter Archives (Dark Horse, 2004 series) #3 ([September] 2006). |
| Reprinted | in Magnus, Robot Fighter (Gold Key, 1963 series) #33 (October 1972); in Magnus, Robot Fighter Archives (Dark Horse, 2004 series) #3 ([September] 2006) |
| Characters | Magnus; a black magic robot; Xyrkol; Dr. Laszlo Noel; the Outsiders [Trum; Howie; Merf; Willo Talltrees]; Dr. Talltrees; Pol-robs; Malev-6 |
| Synopsis | Xyrkol and Noel team-up and create a robot powered by black magic. |
| Genre | superhero; science fiction |
| Script | Russ Manning |
| Pencils | Russ Manning (signed) |
| Inks | Russ Manning (signed) |
| Reprinted | in Magnus, Robot Fighter (Gold Key, 1963 series) #33 (October 1972); in Magnus, Robot Fighter Archives (Dark Horse, 2004 series) #3 ([September] 2006) |
| Genre | science fiction |
| Script | Russ Manning |
| Pencils | Russ Manning |
| Inks | Russ Manning |