Warning: This article contains spoilers for Powers of X #6, by Jonathan Hickman, R.B. Silva, Pepe Larraz, Marte Gracia, David Curiel, VC's Clayton Cowles and Tom Muller, on sale now.
The X-Men's new world order is built on power. As House of X established, the most important resources to the mutant island-nation Krakoa are Omega-Level mutants. With potentially limitless powers, these mutants are the ultimate deterrent against the threat that humanity poses to the now-united mutant race.
A few of those Omega-Level mutants also play key roles in the process that Charles Xavier developed to revive dead mutants. Despite the ingenuity that let him develop that process and knowledge Moira MacTaggert's experiences from her past lives, Powers of X #6 reveals that he was missing one major part of that equation, a reality-warping mutant.
As one of the data pages in the issue goes on to explain, Moira used her expertise in genetics and apparent abundant resources both her and Xavier the highest chance of having mutant children with reality-warping powers.
Although that detail is downplayed and somewhat buried in Moira's diary, it reframes the origins of Legion and Proteus, Xavier and Moira's respective children. While their oddly similar, Omega-Level mutant power sets initially just seemed coincidental, this revelation reframes them as part of Moira's potentially reckless grand design for the X-Men.
David Haller, or Legion, is the son of Xavier and Gabrielle Haller, a nurse and Xavier's former patient. Legion has been defined by his raw power and his unpredictability since he was created by Chris Claremont and Bill Sienkiewicz in 1985's New Mutants #25. Unlike his live-action TV counterpart, Legion has the mutant power to spontaneously generate more powers, each of which usually comes with its own persona.
Although Legion spent a considerable amount of time under the care of Moira and other medical professionals, he was still responsible for inadvertently creating alternate timelines that reshaped reality more than once.
Shortly before the House of X era began, Legion also helped the X-Men take on Nate Grey, another Omega-Level mutant. However, he disappeared after Grey created the Age of X-Man reality and hasn't been seen since.
However, Proteus, Moira's reality-warping son with Scottish politician Kevin MacTaggert, plays a crucial role in House of X. Kevin MacTaggert wields psionic reality-warping powers that give him the power to essentially do anything he wants. However, all of that power takes a toll on his physical form, and he quickly burns out bodies before needing to jump to a new one.
Even though the always-unstable Proteus had almost always been a villain since he debuted in Chris Claremont and John Byrne's X-Men #119 in 1979, he's one of the most beloved mutants on Krakoa in House of X.
With his reality-altering powers, he turns Goldballs' orbs into viable eggs as one of the Five, the mutants who facilitate the resurrection process. Thanks to Moira and Xavier, he always gas an empty, cloned body of Xavier on hand that he can take over whenever he burns his current vessel out. For someone who was isolated for so much of his life, Proteus has also found the acceptance and fellowship that he always needed as part of the Five, who are all inseparable.
Given that state of affairs, it seems like Moira's plan worked. While it's not clear how long that will be the case, her methods reveal something unsettling about her.
In her noble efforts to try to save mutants, Moira engineered the creation of two mutants who were literally too powerful for their own good. With powers that verged on uncontrollable, both Legion and Proteus took lives and posed potentially existential threats in their more antagonistic days.
If Moira didn't realize that Proteus and Legion could become unstable threats, that hints at a shocking lack of foresight on her part, which is especially alarming since she's billed herself as someone who knows the future before it happens.
However, if Moira did realize what those two Omega-Level mutants could become, that means that she's willing to potentially put all of reality at risk to make her vision for mutantkind a reality. While she might present herself as calm and collected, that belies how desperate she truly is with what could be her last chance to save the future for mutantkind.