Using information from Cameron Hodge, thirteen mutant babies were kidnapped, by N'astirh's N’asteris, during the Inferno. The infants arrived in a cemetery, where the demon N'astirh was attempting to create a permanent portal open between the demon infested dimension of Limbo and Earth. The infants were teleported to Times Square, where the New Mutant, Magik, was opening a portal to return her teammates from Limbo and N'astirh, using the babies as the points of an inverted pentagram (focusing beams of power because of their purity and openness to use them as natural, living conduits who could not block the flow of power and who would not know how to shut it off), kept the portal open. N'astirh attempted to used them, and baby Christopher Summers, who later grew-up to become Cable, to open a portal from Limbo to Earth and was partially successful in merging the two realms. The X-Terminators and the New Mutants saved the children.
After the defeat of N'astirh, the Goblin Queen attempted to sacrifice baby Christopher and three other mutant babies atop the Empire State Building to finish N'astirh's work and permanently open a gateway between Earth and Limbo. The invasion was thwarted after the Goblin Queen committed suicide in combat with Marvel Girl, attempting to kill everyone in her power. After the X-Terminators and New Mutants took the babies to X-Factor's Celestial Ship, X-Factor turned the babies over to the US government, after being attacked by Nanny and Orphan-Maker.
For many years the fate of children remained unknown. Following the Inferno, the United States Army founded Project Purgatory to research the fields of the supernatural and paranormal. One of the recruited scientists, Doctor Noc, developed technology to use the children to open portals to Limbo. General Ulysses, Doctor Noc, and a trained band of military soldiers established a military base in Limbo, the Hatchery. At the base, they continued to experiment, both on demons and on the Inferno babies, and train new soldiers. However, when the soldiers recovered the Bloodstone amulet, the base was attacked by Witchfire and the Inferno babies were believed dead. The Earth based military forces sealed off the portal Epsilon, leaving those on the Limbo base stranded to find the observation portal with virtually no hope of escape.
After 26 years in Limbo, but only 4 years on Earth, Noc and Ulysses were able to locate a traveling portal and return home, keeping the existence of the children to themselves. However, they never gave up their mission of taking control of Limbo and capturing Illyana Rasputin. They returned to a world where all of the mutants were living together, on Utopia. and, therefore, their commanding officer, General Combest, ordered them to stand-down. The unit still believed that Illyana was a significant threat and, after Project Purgatory kidnapped Pixie, the Inferno Babies revealed themselves when they killed General Combest and obliterated the entire battalion. The New Mutants showed to rescue Pixie and the Inferno Babies defeated them. After Dr. Noc and General Ulysses took Illyana's Soulsword and Pixie's Souldagger, they extracted the Bloodstones and completed the Bloodstone Amulet to call forth the Elder Gods. They, along with members of Project Purgatory, tortured the New Mutants; Trista controlled Cypher, Bob used a smaller portion of himself to probe into Sunspot's nose, Face had blasted Magma unconscious, and Loca broke Mirage's arm and strapped Cannonball to explosives, while he watched Timothy and members of Project Purgatory beat Mirage more.
While attempting to transport the New Mutants to Limbo, to be used as sacrifices for the Elder Gods, Karma showed Face what Project Purgatory had done to him and he killed Timothy, Maw, and members of Project Purgatory and freed Magik and Karma. Once they returned to Limbo, the Demons Three asked them to turn over the Bloodstone Amulet and General Ulysses had them beg for mercy, then killed. After releasing the Elder Gods, General Ulysses was killed attempting to control them and the group fought against a demon horde. While fighting, Loca was killed by Mirage, Trista ordered Cypher to learn a machine that Trista and the others didn't understand and he used it to magically erase her mouth, ending her influence over him, and Dr. Noc ordered a retreat. While fleeing with Dr. Noc, Scab was destroyed in the escape vehicles by Cannonball, seeking revenge for himself and his teammates.
- In X-Terminators #2 N'astirh says that he needs thirteen children, who will act as focuses for his power and open gate from Limbo to Earth.:
- Ten of them are the Inferno Babies who were used in vertex of the pentagram-gate;
- In X-Terminators #3 N'astirh goes on to say, "I require one more infant to channel power for the entrance spell. And three more after that for final transformation. But that problem is even now being solved.*" with a footnote to see X-Factor #36. The "one more infant" is Christopher Summers. The three other babies are discovered on the top of the Empire State Building by X-Factor & the X-Men in X-Factor #38 after Goblin Queen dies and it reverts to normal.
- 12 members of Inferno Babies (Earth-616)
- 12 appearance(s) of Inferno Babies (Earth-616)
- 1 minor appearance(s) of Inferno Babies (Earth-616)
- 5 mention(s) of Inferno Babies (Earth-616)
- 3 image(s) of Inferno Babies (Earth-616)