The “End Of Greys” storyline, which ran through Uncanny X-Men #466-#468, detailed the horror of the Shi'ar Death Commandos as they nearly eliminated the entire Grey bloodline in a mere twenty-four seconds. Written by legendary X-Men Scribe Chris Claremont and illustrated by Chris Bachalo, the massacre left one survivor: Rachel Grey, the time-displaced daughter of Scott Summers and Jean Grey.

Foregoing her moniker and heritage to the Phoenix, the newly minted Marvel Girl was embracing as normal a life as allowed to a member of the X-Men. Freed from the service of mutant villain Elias Bogan, Rachel now began to resemble her close friend Kitty Pryde in precocious personality and was given time to bond with a family she never got to know. If she appeared infantile, it was because she was finally the daughter she was previously never allowed to be.

Yet the fate of mutants would leave no room for petulance, as the optimistic rejuvenation of the franchise started to reel back in the aftermath of House of M. Bringing mutantkind to arguably its lowest point, their population was decimated by the Scarlet Witch and the United States government mandated that Sentinels would guard Xavier's mansion, day and night. For a mutant born into the Days Of Future Past timeline, it would seem to Rachel like her dreaded future was closer than ever before.

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Amidst all this, the X-Men were still reeling from the recent death of Jean Grey. She died at the hands of Shen Xorn, disguised as Magneto and possessed by Sublime. It was then that the  Shi’ar, an intergalactic empire with a grudge against the Phoenix Force, saw the death of the cosmic entity’s prime host as an opening to end the possibility of the Phoenix ever utilizing a member of the Grey family again. The empire then unleashed the Shi’ar Death Commandos to completely erase the Grey genome from existence.

Completely unaware of the horror about to be unleashed, Rachel meanwhile enjoys the company of the family she has never known. Though the recent loss of Jean looms heavy, Rachel brings out joy in her grandparents, especially her grandfather, John. Admittedly, for her grandmother, Elaine, this does not come easy. In many ways, Rachel is a phantom of all that she has lost. Yet here, as they plan for the evening’s extended family get together, even she can’t help but get caught up in the simple joy of the moment.

It is at this reunion that the Death Commandos strike. Although their attack only lasts a mere 24 seconds, the alien assault team is able to massacre nearly every member of the Grey family.

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Having now lost her daughter, her home and her husband, Elaine Grey is inconsolable and refutes the monstrous grandchild that she wishes she had never met. She longs for the world of the past, for a world where she never heard of Professor Xavier and his mutants, and for a world where neither Jean or Rachel were around to cause her such heartache. She cries this out to Rachel meaning every word until she too is slaughtered.

Even as the X-Men arrive to fight the Death Commandos off, they couldn’t save the Grey family from their fate, and Cyclops himself is particularly affected by the loss of Jean's parents. Even the sole survivor, Rachel, would not emerge totally unscathed, branded with a Deathmark; a black spot permanently etched into her DNA, indicating that she would never be free from the torment of the Shi’ar.

Marked for death, and set on a path for vengeance, Rachel would not wait around for judgment but instead follow the Death Commandos back to space to deliver her own. Embroiling herself in the “Rise and Fall of the Shi’Ar Empire”, a cosmic “War of Kings,” and embracing an echo of the Phoenix found in an alien sword, Rachel would eventually return to Earth, changed immeasurably by her experience.

Now back on Earth, Rachel Grey spurns the mantle of Phoenix, choosing instead to go by the name Prestige. She has connected with her resurrected mother, father, and brother in the Summer’s House. Meanwhile, the Shi’Ar Death Commandos have fared somewhat worse, having recently been swiftly and decisively dealt with when they encountered Magik’s team in Jonathan Hickman and Rod Reis' New Mutants #5.

"End of Greys" marked a tipping point for Rachel, ushering in a return to the harsher characterization that marked her debut. Yet as a member of the newly repurposed  X-Factor, Rachel is being exposed to death on a frequent basis. Further complicating matters is the fact that the mutants have formed a new alliance with the Shi'ar. The return to optimism Rachel's experiencing now could very well be undone in as little as 24 seconds.

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