Inferno Babies

During Inferno, the demons under Nastir'h gathered thirteen mutant infants, whose power and purity would help him forge the pentagram portal over Manhattan and bring Limbo's hordes onto mankind. The babies were saved by the New Mutants and X-Terminators, and turned over to Freedom Force in X-Factor (1st series) #40. Mystique promised the babies would be reunited with their parents, but instead the government requestioned them for other use. Nearly twenty years later, it was discovered that the Inferno babies were taken to Limbo and grew of age on a military installation established there, their bodies and powers twisted by their development in Limbo's environment.