The character first appeared in the standalone story "Fin Fang Foom" in "Strange Tales" #89 (Oct. 1961) and reappeared in "Astonishing Tales" #23-24 (April and June 1974). He was impersonated by the Midgard Serpent in "Thor" #379 (May 1987). His first story was reprinted in "Fantasy Masterpieces" #2 (April 1966), "Where Monsters Dwell" #21 (May 1973) and "Marvel Monsterworks" (1990). Foom eventually reappeared in Marvel continuity in "Legion of Night" #1-2 (Oct. 1991), and then made multiple appearances in "Iron Man" #261 - 264 (Oct. 1990 - Jan. 1991); 267 (April 1991) and 270 - 275 (July-Dec. 1992), and returned in "Iron Man" vol. 3 #15-18 (April–July 1999).