FORGE

After M-Day shrank the world's powered mutant population to a remnant, Forge set about building the most dangerous guard dog imaginable in his Dallas workshop: a Nimrod unit of his own, a Sentinel-class machine reprogrammed from first principles to protect mutants and humans alike and to destroy other Sentinels. The project was still on his workbench when a second Nimrod arrived to inspect it — a battle-damaged one, fresh from the future.

The visitor was the Nimrod that had been secretly guiding the Reverend William Stryker's crusade, and it came with a demand backed by a threat: repair it, or it would spend its remaining power teleporting to Africa to kill Storm. Playing for time, Forge learned the machine's strangest credential — in its own timeline, a future Forge, married to Storm in that era, had been the one to fit Nimrod with time-travel capability in the first place.

Forge's counter-move was an offer the machine could not refuse: the gleaming new Nimrod body he had just built, offered as a replacement chassis. Nimrod downloaded itself into the fresh hardware — straight into a trap with no exit plan yet attached. Forge got a distress call out, the X-Men were unreachable, and so their students answered instead; the young New X-Men fought the upgraded Nimrod head-on and overloaded its borrowed time device, hurling it back into the timestream in New X-Men Vol. 2 #26–31 (2006).