| Release: | Jan 1968 |
| Cover: | Jan 1968 |
The Mark of the Monster / The First Evil Mutant
| Release: | Jan 1968 |
| Cover: | Jan 1968 |
The Mark of the Monster - Frankenstein's monster has been found and is set to thaw and revive. Professor X sends the X-Men out to investigate the true nature of the creature.
The First Evil Mutant - Scott has met another mutant, and this one can teleport and has hands made of diamond. His goals are selfish, and Scott is unwilling to help the man. Will he fight against Jack in his upcoming confrontation with Charles Xavier, though?
| Writer | Roy Thomas |
| Cover Penciller | George Tuska |
| Cover Inker | George Tuska |
| Penciller | Don Heck |
| Inker | George Tuska |
| Letterer | Artie Simek |
| Editor | Stan Lee |
| Beast | Henry 'Hank' McCoy |
| Cyclops | Scott Summers |
| Iceman | Robert 'Bobby' Drake |
| Angel | Warren Worthington III |
| Marvel Girl | Jean Grey |
| Frankenstein | |
| Changeling | Kevin Sidney |
| Jack O'Diamonds | Jack Winters |
| Age | Silver Age |
|---|---|
| Format | Digital |
| Series Group | X-Men |
| Genre | Action | Adventure | Super-Heroes |
| No. of Pages | 32 |
| Country | USA |
| Language | English |