3.14159 (Earth-1191) VS A.C. O'Connor (Earth-616)

The Sentinel that would name itself 3.14159 was one of the Sentinels brought to Earth-616 by the time traveler Trevor Fitzroy of Earth-1191. As part of the "game" he was playing with the Upstarts, Fitzroy sent his Sentinels to murder the Reavers, and their leader Donald Pierce.[1] This Sentinel was severely damaged and shut down, and constantly doused in the bio-mechanical fluid that Pierce had used to create his cyborgs and androids. Later when Wolverine and Jubilee went to the Reavers headquarters to investigate on orders from Professor X they accidentally reactivated the Sentinel.[2] Having become sentient due to its exposure to the bio-mechanical fluid, it determined that it should act in the best interest of Sentinel kind and decided to wipe out all of humanity. Using a time warp to transport itself (along with Wolverine and Jubilee) to the Anthill, the base of the now deactivated Sentinels built by Larry Trask, it built a device that would cause a solar flare and eradicate all human life on the Earth.

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A.C. "Ace" O'Connor was a reporter who got involved in the mysterious robot serial killer story surrounding Rom, Spaceknight. Unknown to the world at large, Rom was actually a heroic figure eliminating evil aliens called Dire Wraiths who had infiltrated the Earth using their shape-changing powers. To human eyes, Rom was killing random people with a ray gun, reducing them to ash. In fact, Rom's Neutralizer was banishing the Dire Wraiths to Limbo. [1] Ace was tipped off at first by the fact that all the "victims" of the robot killer in Clairton, West Virginia all shared the same birthdate. Ace's investigation brought her to the government program Project: Safeguard where she managed to capture Rom's Neutralizer in action on film. Upon developing her photos, she discovered the camera was able to capture what the human eye could not, showing an alien creature disappearing into Limbo instead of the "murder" of a human being.

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