The F.F. are vacationing in a European forest, when they encounter an old castle. Ancient myth says it was home to the world’s greatest alchemist, the dreaded Diablo, who may still be alive thanks to his life extending potion. They soon learn, much to their regret, that Diablo is, indeed, alive and dangerous.
| Barcode | N/A |
|---|---|
| Character | Diablo (Esteban Coraz n de Ablo), Invisible Woman (Susan Storm Richards), Human Torch (Jonathan 'Johnny' Storm), Mr. Fantastic (Reed Richards), The Thing (Benjamin J. Grimm) |
| Cover Date | September 1964 |
| Issue | 30A |
| Rating | N/A |
| Artist | N/A |
| Colorist | N/A |
| Cover Artist | N/A |
| Cover Colorist | N/A |
| Cover Inker | Chic Stone |
| Cover Painter | N/A |
| Cover Penciller | Jack Kirby |
| Cover Separator | N/A |
| Editor | Stan Lee |
| Editor in Chief | Stan Lee |
| Inker | Chic Stone |
| Layouts | N/A |
| Letterer | Artie Simek |
| Painter | N/A |
| Penciller | Jack Kirby |
| Plotter | N/A |
| Scripter | N/A |
| Separator | N/A |
| Translator | N/A |
| Writer | Stan Lee |
