| Issue | #21 |
| Published | January 1970 |
| Cover Price | 0.15 |
| Pages | 36 |
| Editing | Stan Lee |
| Genre | superhero |
| Pencils | Marie Severin |
| Inks | Johnny Craig |
| Characters | GS: Lord Seth (D) |
| Genre | superhero |
| Script | Roy Thomas |
| Pencils | Marie Severin |
| Inks | Johnny Craig |
| Colors | Marie Severin |
| Letters | Artie Simek |
| Reprinted | in Fantastici Quattro, I (Editoriale Corno, 1971 series) #82 |