Amanda Mueller was an early collaborator of Mister Sinister's after he was transfigured by Apocalypse. Her interest in mutantkind (and in preserving her own lifespan) led to the development of Project: Black Womb at the Alamogordo research facility. Countless mutant and potential mutant children were studied at Alamogordo, including the infant Mortimer Toynbee. Researchers at Alamogordo included Kurt Marko, Brian Xavier, Alexander Ryking, Irene Adler, and Sinister himself as Nathan Milbury.
Project: Black Womb