Mutated rat with a grudge against humanity.
Endgame first appeared in Volume 3, Issue #1, wherein she attempted to enact a plan to regress the entire U.N. assembly into apes. She was driven off by a combination of Blueprint, Hood, Apparition, and the members of the Vanguard.
Endgame reappeared in Volume 4, Issue #3 as the mastermind behind the release of mind-control spores in a hotel where a major SuperPAC was holding its annual convention. Her plan was to use the spores to slowly steer American politics toward thermonuclear exchange and the resultant destruction of human civilization. She was again defeated by the New Guard during a pitched battle in Outpost One.
Endgame reappeared again in Volume 5, Issue #7 as a member of the Hyperpower. She was credited with engineering the genetic tailoring systems involved in the Chrono-Spatial Distortion Array.