X-Men Finally Meet Marvel's Most Powerful Mutant For First Time

Published Nov 7, 2026, 8:00 AM EST

Nicolas Ayala is a Senior Writer for the Comics team at ScreenRant, with over five years of experience writing about Superhero media, action movies, and TV shows. 

Sign in to your ScreenRant account

Years after her secret introduction, the X-Men's most powerful villain finally decides to face the mutant heroes. The X-Men's most dangerous enemies aren't necessarily the ones capable of leveling cities and manipulating reality. In fact, some of the mutants' most persistent villains are frightening because their greatest weapons have little to do with superpowers. For instance, Mister Sinister is an exceptionally dangerous geneticist whose obsession with mutant evolution has caused generations of suffering. Sabretooth presents a different kind of danger due to his vicious personality and sheer cruelty, which human extremists take to a country-wide and worldwide scale.

On the flip side, some of the X-Men's most powerful enemies have little interest in conquering or destroying the Earth despite possessing enough power to become threats to the wider Marvel Universe. Cassandra Nova's telepathic abilities could allow her to become the ultimate anti-Charles Xavier and unleash a global crisis, but her hatred of mutants and obsession with Charles Xavier give her a much more personal motivation. Likewise, Mojo and Shadow King have access to entire extraneous dimensions, but they're equally fixated on the X-Men and mutantkind.

If the X-Men have learned something about their villains, it's that hatred is the most dangerous source of conflict within their villains, especially when they're naturally powerful.

Justina LaGuardia Embraces Her Role As An X-Men Villain

X-Men United #9; Written By Eve L. Ewing & Evan Narcisse; Art By Ruarí Coleman, Roberto Poggi, And Brian Reber

In X-Men United, Justina LaGuardia has adopted the fitting codename Superior and stepped out of the shadows to harness her potential as an X-Men antagonist. Having originally rejected Charles Xavier’s recruitment when Professor X was assembling his original team, Justina LaGaurdia has spent years honing her terrifying mutant ability to duplicate and surpass the superpowers of anyone in her vicinity. Now, Justina reveals her existence to the X-Men, orchestrating schemes like the kidnapping of Blade's daughter Brielle and tempting Emma Frost to fight her by brushing off the White Queen's psionic attack and tapping into her mind.

Marvel · Mutant Profile Which X-Men Character Are You? “Mutation: it is the key to our evolution.”

🐺 Wolverine The Loner

🧠 Professor X The Visionary

🧲 Magneto The Survivor

ACTIVATE CEREBRO →

01

Humans discover your mutant abilities. What do you do?

ADisappear. Go off the grid before anyone can come after me — I don’t owe them an explanation BReach out calmly and try to have a dialogue — fear comes from misunderstanding, and I can help bridge that gap CMake a show of strength — they need to understand that mutants will not be hunted or controlled, ever

NEXT →

02

Anti-mutant protesters surround a school full of young mutants. What’s your first move?

AGet between the kids and the mob. If anyone raises a hand, they answer to me BAddress the crowd telepathically or publicly — show them the children are just scared kids, not threats CEvacuate the children to safety, then make the protesters deeply regret their choices

NEXT →

03

A team of mutants needs a leader for a dangerous mission. What role do you naturally fall into?

AI work alone, but I’ll take point — someone’s gotta make sure nobody gets killed BI coordinate the team, play to each person’s strengths, and keep morale steady CI lead from the front — my vision, my plan, my responsibility if it fails

NEXT →

04

A powerful mutant threatens innocent humans. How do you respond?

APut them down fast — talk later. Innocent people don’t have time for a debate BTry to reach them mentally — understand why they’re doing this and find a peaceful resolution COffer them a place at my side — their power is wasted on chaos when it could serve a greater cause

NEXT →

05

A human politician offers to champion mutant rights — but has a shady past. What do you do?

AGive them a chance — people can change, and this alliance could mean real progress for coexistence BI don’t trust politicians. Watch them closely, and the second they betray us, I’ll be right there CUse them — let them think they’re in charge while I control the narrative from behind the scenes

NEXT →

06

What’s your biggest flaw?

AI push people away — I’d rather be alone than risk losing someone I care about BI’m too idealistic — I keep believing in people even when the evidence says I shouldn’t CMy anger — once I commit to a path, I’ll burn everything down before I admit I was wrong

NEXT →

07

Sentinels are hunting mutants in your city. What’s your move?

AHunt the hunters — tear them apart before they find anyone else BCoordinate an underground network to hide and protect every mutant in the area CSeize control of the Sentinels — turn the weapons of oppression into instruments of liberation

NEXT →

08

What do you believe about coexistence between humans and mutants?

ACoexistence is a fantasy. Humans will always fear what they can’t control — mutants must secure their own future BI don’t care about the big picture — I protect the people I care about, and everyone else can sort themselves out CIt’s possible and worth fighting for — the dream of a world where humans and mutants live in peace is everything

REVEAL MY MUTANT IDENTITY →

Cerebro Scan Complete Your X-Men Identity

🐺

Wolverine (Logan)

“I’m the best there is at what I do. But what I do best isn’t very nice.” You’re the fierce loner who acts first and philosophises later — but beneath that adamantium-plated exterior beats a heart that cares far more than you’d ever admit. You’ve been burned enough times to distrust the world, so you keep people at arm’s length, yet you’d throw yourself into any fight to protect the ones who slip past your defences. You don’t need a cause or a manifesto — you just need someone worth fighting for. Like Logan, your greatest strength isn’t your claws or your healing factor; it’s the stubborn refusal to let the people you love face danger alone.

Fierce Protective Resilient Untamed

🧠

Professor X (Charles Xavier)

“Just because someone stumbles and loses their path, doesn’t mean they’re lost forever.” You’re the visionary who sees the best in everyone — even when the world gives you every reason not to. Your greatest power isn’t telepathy; it’s an unshakeable belief that understanding and compassion can bridge any divide. You lead not through force but through hope, building bridges where others build walls. Some call you naive, but you know that real strength lies in extending a hand to your enemy. Like Charles Xavier, you carry the weight of a dream that most consider impossible, and you refuse to let it die.

Visionary Empathetic Diplomatic Hopeful

🧲

Magneto (Erik Lehnsherr)

“Peace was never an option.” You’re the survivor who learned the hardest lesson life has to offer: the world will not protect you, so you must protect yourself. Your conviction is unbreakable and your patience is terrifying — you’ll wait years to set the right plan in motion. You don’t hate humanity; you simply refuse to let your people be victims ever again. Every action you take, no matter how ruthless, is driven by a profound love for those who share your struggle. Like Erik Lehnsherr, you are both revolutionary and tragic — a leader forged in pain who will bend the world before it bends you.

Resolute Strategic Ruthless Unyielding

↻ PLAY AGAIN

Justina LaGuardia’s willingness to become an X-Men villain is a direct result of her ideological opposition to everything Charles Xavier and his successors represent. From her perspective as a former Italian detective, the X-Men are a group of child soldiers that only bring destruction everywhere they go. Justina genuinely believes that gathering young mutants together at institutions like Graymatter Lane repeats Xavier's worst mistakes and causes far more harm than good. Compounded by a mischievous personality, Justina finds joy in overpowering the X-Men and showing them how weak and unstable they actually are.

Justina LaGuardia Works Best As A Character Who Rejects Heroism And Villainy

Justina LaGuardia Answers To No One

Justina LaGuardia stands apart from the binary of conventional heroes and villains since her debut. Her independence was established from the very beginning, when she flatly rejected Charles Xavier’s invitation to become a founding member of the original X-Men, refusing to be molded into someone's soldier. Instead of seeking glory using her incredibly overpowered mutation, Justina chose a life in the shadows and mastered her ability to surpass the powers of those around her without ever needing a mentor or a team. This decision shouldn't change permanently now that she has unveiled her presence and started to attack the X-Men.

Notably, Justina LaGuardia also refuses to align herself with the X-Men's other villains just as firmly as she rejects the heroes. All these years, LaGuardia has pursued a solitary path dictated entirely by her personal ideology and her whims. Even though she could easily provide her powers to the highest bidder or help the X-Men's villains destroy the team she rejected, Justina simply acts as a self-directed wildcard who sees both mutant revolutionaries and human oppressors as fundamentally flawed. Hence, after her first encounter with the X-Men, Justina LaGuardia should ideally preserve her status as a fascinatingly unpredictable mutant.

What do you think about Justina LaGuardia?

X-Men United #9 is available November 11 from Marvel Comics