Proteus (Marvel Comics)

When the Scarlet Witch altered history and created the House of M reality, she inadvertently released Mutant X on the world again. Just as before, Moira MacTaggert discovered her son Kevin possessed vast mutant powers that were eating away at his body, and tried to cure him of this affliction. In the House of M, however, any attempt to "cure" mutation was a capital offense, and Magneto's Sentinels destroyed Moira's lab on Muir Island, making her a wanted fugitive and setting Kevin loose to kill as he pleased. Mutant X soon became an infamous Scottish serial killer known for the desiccated corpses he left in his wake.

He encounters the Exiles and actually manages to escape the House of M by stealing data from the Panoptichron. Notably, when he leaves his home reality he inhabits bodies of superhumans from "approximation" realities or Exiles members only. He has inhabited the bodies of an unnamed mutant, of Blunderbuss, and of Angel Salvadore in House of M; Mimic and Morph in Exiles; Justice from the New Universe; and the Hulk from the Marvel 2099 universe. None of these bodies lasts for long, with the exception of Angel Salvadore. Other reality manipulators, such as Longshot may be immune to Proteus's manipulations.[18] Mutant X's current body, Morph from Exiles, also does not seem to deteriorate while Proteus inhabits it.[19]

Proteus states that he could not stop thinking about Blink.[20] Whether it was because he still had some of Mimic's memories or because he actually felt something for her is not yet clear. He states he was tired of fighting and that he just wants to talk, but before he can say anything, Longshot shields Blink, allowing her to teleport to safety. It is revealed by Proteus himself that his mind is able to recall all memories and feelings of his previous hosts. Following the death of Mimic, when Proteus transferred into Morph, Blink tricks Proteus into wearing a portable Behavior Modification System (from the Squadron Supreme's world), which she teleported into the crown he was wearing. The device brainwashes him into believing he is actually Morph and leaves him able to recall only Morph's memories prior to his possession. Unaware of his true identity, he begins behaving exactly like Morph and a member of the Exiles, much to the discomfort of the other Exiles.[21] With Proteus trapped and believing he is Morph, he remained an Exile to continue fixing damaged realities. Considering Morph's body does not burn out like other hosts, Morph's consciousness is still active beneath Proteus. Also, Proteus is immune to metal while in Morph's body, since wearing a metal tiara during the "Heroes Reborn" world did not kill him. However, concerns about some discrepancies in "Morph's" behavior forced his teammates to plan regular brainwashings with the same device, and, eventually, put him in stasis whenever his behavior again became abnormal. However, that device was destroyed when Psylocke and Sabretooth fought so intensely that they shook the Crystal Palace, causing a bookcase to fall on Morph's head, shattering the device.[22]

During a confrontation where Proteus reawakened, he found himself lacking in power to defeat the adversary. About to be crushed, Proteus shouted aloud his desire to stay alive. In a vision, he saw a figure, almost identical to his own true energy form, telling him to take its hand, and he would survive. Upon doing so, Proteus found himself full of even greater power, using it to defeat his god-like enemy. Afterwards, it was revealed that this being was the personality and soul of the true Morph, having been in limbo, gaining strength within Proteus and his own body, who had before only been able to speak a few sentences through Proteus's control. Revealing to Proteus that he had the ability to eject him from his body, Morph gave Proteus the chance to work together and share his body and their powers, in order to do more good, something which Morph had discovered Proteus desired deep inside. Proteus accepted, and the two now work in harmony, better than either could be alone.[23] Some time later, though, Proteus and Morph were completely separated by forces beyond their control. The crystalline structure of the Panoptichron reacted to the Exiles' continued presence in its walls by absorbing them into the crystal itself. The Crystal Palace somehow differentiated between Proteus and Morph, absorbing the former into the crystal walls while leaving the latter unscathed.[24]

Some of the Exiles that were trapped in the Crystal Palace have since resurfaced in other stories, indicating that those Exiles were eventually released from the crystal wall unharmed. Linearly speaking, Proteus was eventually restored as dispersed energy on Earth-616 and decided he was not happy being dead anymore, and arranged to bring himself back to life. To accomplish this, he planned to roughly recreate the process previously used by Harness and Piecemeal. When Selene began using the Technarch transmode virus to resurrect dead mutants, Proteus took advantage of her work by affixing a small portion of his energy signature, and therefore his consciousness, to the precognitive Destiny as she was resurrected. (This worked because Destiny died on Muir Island, a place with one of the largest concentrations of residual Proteus energy.) Although the quantum of Proteus energy involved was not enough to truly "possess" Destiny as he had done in the past, Proteus was able to influence Destiny's perceptions so that she saw a future of his design, and acted accordingly.[25]

When Destiny tried telepathically contacting her foster-daughter Rogue, she instead found Blindfold and passed on her vision (and unwittingly a portion of Proteus energy). Now being influenced by Proteus as well, Blindfold confirmed Destiny's obscured vision that a threat was rising on Muir Island, and the X-Men needed to stop it. Trusting their premonitions, Cyclops dispatched Blindfold with a squad of X-Men for Muir. Once they arrived, Proteus was able to use Blindfold like a "psychic magnet", soaking up more and more Proteus energy from his familiar surroundings until she reached critical mass, and enough Proteus energy was consolidated in one place to truly resurrect Kevin MacTaggert, letting him fully possess Blindfold. Destiny had recognized her error after passing the energy on the Blindfold, but arrived too late to stop Proteus's ascension.[26]

Once he was restored, Proteus turned on the X-Men, particularly his murderer Colossus who was among the team, and Magneto whose power over Proteus's weakness, metal, made him the most dangerous. Worse still, Proteus's experience reconstituting himself taught him how to split his energy among multiple bodies, possessing several X-Men simultaneously as he added Nightcrawler, Husk, Trance and Psylocke to his existing hosts Blindfold and Destiny. Rogue struck back at Proteus, stealing Psylocke's psi-knife to disrupt his control of his hosts one by one. As Rogue's stolen power wore off, Magneto magnetically launched himself and "Blindfold" into low orbit. Although Proteus managed to redirect them back to Earth, the distraction gave Magneto the time he needed to electromagnetically identify Proteus's energy wavelength, and disrupt it. With Proteus back in the same position he was in when he initiated his own resurrection hours earlier, Psylocke questioned how they knew he would not return one day. Magneto ominously replied that, in fact, they should know that he would return.[27]

Some of Proteus's energy was found drifting in the Astral Plane by the Shadow King, who used it to become his new source of power, in an endless battle between him and Xavier, who had been forced to partake in this following his death at the hands of Cyclops. In the battle's final moments, Shadow King spread Proteus as a psychic infection on London. With the help of his X-Men, Xavier (now inhabiting Fantomex's body and calling himself X), defeated the Shadow King, and unaware of the psychic infection nature, he was eventually able to gather it in the shape of a green sun, reconstituting in the process Proteus.[28] Knowing that Proteus is vulnerable to metal, Old Man Logan wants to face him with Archangel, but X wants to reason with him first and asks for Psylocke's help to enter Proteus's mind together. Proteus feels his mind being forced into and allows X and Psylocke to enter his mental landscape. X and Betsy find themselves near a beautiful castle where they are welcomed by the young Kevin McTaggert. Kevin believes atonement and change are possible and strongly believes he was only ten years old at the time Colossus killed him back at Muir Island (although it was established that Kevin was actually 19 or 20 years old at the time). He came back a few times after that, but the X-Men were always there to kill him just because he dared to see the world after years off imprisonment. When the Shadow King grabbed a hold of his psyche, he spent ten thousand years on the Astral Plane reflecting on what he had done to all the poor people he had possessed back then. Kevin shows Betsy an image of her original body dressed in the pink uniform and asks her if she is still the same person she was when she started her journey. Kevin argues that the X-Men want to kill him again just because he did something bad in the past. Proteus says if they leave him alone, he will leave them alone as well. X does not want to risk, and attacks Kevin instead. In retaliation, Proteus merges the physical bodies of X and Psylocke and sends them back to London.[29] After the merger is undone and X and Psylocke are rescued by their teammates, X reveals that Proteus is planning to bring the Astral Plane into the real world to make it function like the psionic realm.[30] Kevin traveled to the Scottish village of Fetters Hill, in order to carry out his experiment and granted the citizens of the town the ability to make real whatever they wished. As the X-Men confronted Proteus again, the village had already fallen into chaos, and it became a gestalt of the villagers' mindscapes. During the fight Proteus made Fetters Hill erupt, launching seeds into many cities of the world with the objective to transform them as well. The X-Men were eventually able, after a fieriest battle, to disrupt Proteus's energies and dispersed his physical structure while the damage he caused to reality was reversed by Psylocke and X.[31]

Proteus is shown to be an inhabitant of Krakoa where he is inhabiting a Professor X husk. He is paired up with Elixir, Hope Summer, Goldballs, and Tempus as The Five where they use their talents to resurrect dead mutants.[32]

In the Star Trek/X-Men crossover, the spirit of Proteus crosses over to the universe of Star Trek because of a rift created by classic Star Trek antagonist Gary Mitchell (who also had reality warping powers). Proteus is able to reanimate and inhabit Mitchell's corpse, which does not deteriorate like other hosts. While chasing Deathbird, the X-Men end up teaming up with the crew of the USS Enterprise to stop Proteus, who forms an alliance with Deathbird to escape the planet.[33]

At one point, Proteus compares Mitchell's fate (as seen in the Star Trek TV series episode "Where No Man Has Gone Before") to the kind of anti-mutant prejudice that the X-Men are fighting.[33]

In the Ultimate Marvel universe, Proteus is named David Xavier and is the son of Moira MacTaggert and her ex-husband Professor X (Charles Xavier). Like in the mainstream version, he escapes his mother's keep on Muir Island, seeking his father in order to kill him. Proteus kills thousands of people all across the world in an attempt to discredit the X-Men, where he also murders Psylocke's partner Dai Thomas, an agent of S.T.R.I.K.E. Before David can finish his deadly vendetta, he is found to be inside Betsy, traveling to Germany where Betsy fought David for control. After Xavier refused to kill David, Colossus kills them both by crushing them inside a car.[34]

• Uncanny X-Men #125–128
• Classic X-Men #32
• Classic X-Men #36
• Uncanny X-Men Annual #15
• New Mutants Annual #7
• X-Factor Annual #6
• New Warriors Annual #1
• Star Trek/X-Men
• Exiles #69–82
• X-Men Legacy #232–233