- Script
- Roy Thomas (credited)
- Pencils
- Don Heck (credited)
- Inks
- George Tuska (credited)
- Colors
- ?
- Letters
- ?
- Genre
- super-héros (superhero)
- Characters
- X-Men [Cyclops [Scott Summers]; Marvel Girl [Jean Grey]; Angel [Warren Worthington III]; Iceman [Bobby Drake]; Beast [Hank McCoy]]; V: Grotesk [Gor-Tok] (introduction); King Krono (introduction, death); Princess Ingar (introduction, death; in flashback); GS: Changeling; GA: Zelda Kurtzberg; Vera Cantor
- Synopsis
- A subterranean race was destroyed by underground atomic tests and the lone survivor, Gor-Tok, seeks revenge against those responsible - humans.
- Reprints
Changeling is disguised as Professor X.
- Script
- Tom DeFalco (credited)
- Pencils
- Arvell Jones (credited) (layouts); Sam de la Rosa (finishes)
- Inks
- Sam de la Rosa
- Colors
- Dave Billman
- Letters
- ?
- Genre
- super-héros (superhero)
- Characters
- Fantastic Four [Thing [Ben Grimm]; Mister Fantastic [Reed Richards]; Invisible Girl [Sue Storm Richards]; Human Torch [Johnhny Storm]]; Watcher [Uatu]; Giant-Man [Bill Foster]; AIM; MODOK; Captain America [Steve Rogers]; Alicia Masters
- Synopsis
- The Thing continues to Mutate from Virus-X.
- Reprints
Based on events occurring in Marvel-Two-In-One #81.