Secondary mutation
Encyclopedia
In the fictional Marvel Universe
Marvel Universe
The Marvel Universe is the shared fictional universe where most comic book titles and other media published by Marvel Entertainment take place, including those featuring Marvel's most familiar characters, such as Spider-Man, the Hulk, the X-Men, and the Avengers.The Marvel Universe is further...

, secondary mutation is a global phenomenon
Phenomenon
A phenomenon , plural phenomena, is any observable occurrence. Phenomena are often, but not always, understood as 'appearances' or 'experiences'...

 among mutants
Mutant (Marvel Comics)
In comic books published by Marvel Comics, a mutant is an organism who possesses a genetic trait called an X-gene that allows the mutant to naturally develop superhuman powers and abilities...

 that seems inexplicable, with many previously established mutant characters suddenly developing new or vastly expanded powers. Henry McCoy
Beast (comics)
Beast , Dr. Henry Philip "Hank" McCoy, is a comic book character, a Marvel Comics superhero and a member of the mutant team of superheroes known as the X-Men...

 hypothesizes
Hypothesis
A hypothesis is a proposed explanation for a phenomenon. The term derives from the Greek, ὑποτιθέναι – hypotithenai meaning "to put under" or "to suppose". For a hypothesis to be put forward as a scientific hypothesis, the scientific method requires that one can test it...

 that, since the mutant population was entering the millions at that time, mutant physiology
Physiology
Physiology is the science of the function of living systems. This includes how organisms, organ systems, organs, cells, and bio-molecules carry out the chemical or physical functions that exist in a living system. The highest honor awarded in physiology is the Nobel Prize in Physiology or...

 was responding to the need for survival. Thus in rare occasions a mutant's powers change or become even greater, and in rare cases they can develop a new, often unrelated ability. However, the criteria for secondary mutation is ill-defined at best, leaving many fans confused as to their favorite character's status or powers. This use of secondary mutations can sometimes be misused as a deus ex machina
Deus ex machina
A deus ex machina is a plot device whereby a seemingly inextricable problem is suddenly and abruptly solved with the contrived and unexpected intervention of some new event, character, ability, or object.-Linguistic considerations:...

plot device; if the writer can't think of a way for a character to get out of a situation, they can simply develop a spontaneous new power to handle the problem.

Known mutants with secondary mutations

  • Gambit
    Gambit (comics)
    Gambit is a fictional character, a Marvel Comics superhero that has been a member of the X-Men. Created by writer Chris Claremont and artist Jim Lee, the character first appeared briefly in Uncanny X-Men Annual #14 , weeks before a more comprehensive appearance in Uncanny X-Men #266...

     (Remy Lebeau): Gambit is able to psionically suggest things to people using his hypnotic charm. It allows him to exert a subtle influence over sentient beings, leading them to believe what he says and agree with his suggestions. This charm is so powerful that if given a chance, Gambit could charm the Shadow King
    Shadow King
    The Shadow King, also known as Amahl Farouk, is a fictional character that appears in comic books published by Marvel Comics. The Shadow King exists as an entity of pure psychic energy that feeds on the hatred of humanity...

    . However, the charm does not work on those who know about it. It is also a passive mutation and he cannot actively control it. He is unable to go up to a stranger and say "Jump off a bridge" but if the setting is right and he works up to it (in his trademark style) then he can influence people. He also has empathy and can feel -- and according to some sources, influence -- others' emotions. Gambit was recently blinded as one of his own kinetically-charged cards blew up in his face. During his state of blindness, he developed a precognitive ability. When his vision was restored, this power disappeared.

  • Polaris
    Polaris (comics)
    Polaris is a fictional comic book character appearing in books published by Marvel Comics, in particular the X-Men family of books. Created by Arnold Drake, Don Heck, Werner Roth and Jim Steranko, Polaris first appeared in The X-Men #49...

     (Lorna Dane): after having her mutant powers leeched by her supposed-sister, Zaladane
    Zaladane
    Zaladane is a fictional character, a sorceress from Marvel Comics and the high priestess of the sun god Garokk, the Petrified Man...

    , Lorna developed the first recorded case. Her body mass had increased, along with her strength and resistance to injury. When her secondary powers were used, it developed negative emotions in anyone around her. Later, Lorna regained her original powers after Zaladane's death, and her secondary mutation vanished. This was retcon
    Retcon
    Retroactive continuity is the alteration of previously established facts in a fictional work. Retcons are done for many reasons, including the accommodation of sequels or further derivative works in a series, wherein newer authors or creators want to revise the in-story history to allow a course...

    ned to be the first known secondary mutation when the concept was first introduced.

  • Beast
    Beast (comics)
    Beast , Dr. Henry Philip "Hank" McCoy, is a comic book character, a Marvel Comics superhero and a member of the mutant team of superheroes known as the X-Men...

     (Hank McCoy): He developed a higher level of power mutation after being seriously injured by the villain Vargas
    Vargas (comics)
    Vargas is a fictional comic book supervillain in the Marvel Universe and an enemy of the X-Treme X-Men who first appeared in X-Treme X-Men #1.- Fictional character biography:...

    . Sage
    Sage (comics)
    Sage, also known as Tessa, is a fictional character in the Marvel Comics universe. She has most often been associated with the X-Men and the Hellfire Club, whom she spied upon for Professor Charles Xavier....

     attempted to use her ability to "jump start" mutation to save his life. This resulted in Beast evolving from his original simian
    Simian
    The simians are the "higher primates" familiar to most people: the Old World monkeys and apes, including humans, , and the New World monkeys or platyrrhines. Simians tend to be larger than the "lower primates" or prosimians.- Classification and evolution :The simians are split into three groups...

     form into a giant feline
    Felidae
    Felidae is the biological family of the cats; a member of this family is called a felid. Felids are the strictest carnivores of the thirteen terrestrial families in the order Carnivora, although the three families of marine mammals comprising the superfamily pinnipedia are as carnivorous as the...

     form. However, it is unclear if this is a true secondary mutation or if this is the result of permanent alteration to his genetic structure resulting from self-experimentation and the mutagenic abilities of Infectia
    Infectia
    Infectia is a fictional character appearing in the Marvel Comics universe.-Publication history:Infectia first appeared in X-Factor #28 , and was created by Louise Simonson and Walt Simonson....

    .

  • Emma Frost
    Emma Frost
    Emma Grace Frost is a fictional character that appears in comic books published by Marvel Comics. The character first appeared in Uncanny X-Men #129 , and was created by writer Chris Claremont and artist/co-writer John Byrne....

    : Emma's secondary mutation activated in the midst of the bombing of Genosha
    Genosha
    Genosha is a fictional country that has appeared in numerous comic book series published by Marvel Comics. It is an island nation that exists in Marvel's main shared universe, known as "Earth 616" in the Marvel Universe. The fictional nation served as an allegory for slavery and later for South...

     by Cassandra Nova's
    Cassandra Nova
    Cassandra Nova is a fictional enemy of the X-Men in the Marvel Comics universe. Created by writer Grant Morrison and artist Frank Quitely, Cassandra first appeared in New X-Men #114 . Cassandra is a "mummudrai," a parasitic life form born bodiless on the astral plane...

     wild Mega-Sentinels
    Sentinel (comics)
    Sentinels are a fictional variety of mutant-hunting robots, appearing in the Marvel Comics Universe. They are usually portrayed as antagonists to the X-Men. Created by Stan Lee and Jack Kirby, they first appeared in The X-Men #14 .According to Marvel canon, Sentinels are programmed to locate...

    . She transformed into an indestructible organic
    Organic (model)
    Organic describes forms, methods and patterns found in living systems such as the organisation of cells, to populations, communities, and ecosystems.Typically organic models stress the interdependence of the component parts, as well as their differentiation...

     diamond
    Diamond
    In mineralogy, diamond is an allotrope of carbon, where the carbon atoms are arranged in a variation of the face-centered cubic crystal structure called a diamond lattice. Diamond is less stable than graphite, but the conversion rate from diamond to graphite is negligible at ambient conditions...

     form that saved her life, but negates her telepathy
    Telepathy
    Telepathy , is the induction of mental states from one mind to another. The term was coined in 1882 by the classical scholar Fredric W. H. Myers, a founder of the Society for Psychical Research, and has remained more popular than the more-correct expression thought-transference...

     so she cannot use both powers at once.

  • Angel (Warren Worthington III): discovered his new power while being wounded in a battle with a group of werewolf
    Werewolf
    A werewolf, also known as a lycanthrope , is a mythological or folkloric human with the ability to shapeshift into a wolf or an anthropomorphic wolf-like creature, either purposely or after being placed under a curse...

    -like mutants called the Dominant Species. Both he and his teammate Husk
    Husk (comics)
    Husk is a fictional character from Marvel Comics. Guthrie is a superhero associated with the X-Men.A mutant, Husk has the ability to remove one layer of skin - or "husk" - revealing an epidermis of a different composition beneath...

     were severely wounded. Husk almost died, but was brought back through contact with Warren's blood
    Blood
    Blood is a specialized bodily fluid in animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells....

     seeping in through wounds on her own body. His blood
    Blood
    Blood is a specialized bodily fluid in animals that delivers necessary substances such as nutrients and oxygen to the cells and transports metabolic waste products away from those same cells....

     gained a healing property that can be used to mend and regenerate others of the same blood type. This activation was then retcon
    Retcon
    Retroactive continuity is the alteration of previously established facts in a fictional work. Retcons are done for many reasons, including the accommodation of sequels or further derivative works in a series, wherein newer authors or creators want to revise the in-story history to allow a course...

    ned as having occurred earlier, in a battle against Black Tom Cassidy
    Black Tom Cassidy
    "Black Tom" Cassidy is a Marvel Comics supervillain, an enemy of the X-Men, and archenemy of Banshee. Created by writer Chris Claremont and artist Dave Cockrum, he first fully appeared in Uncanny X-Men #101...

    , when his skin turned from blue to normal (later described as a result of his healing factor activating). Angel had previously been modified by Apocalypse
    Apocalypse (comics)
    Apocalypse is a fictional character who is an ancient mutant that appears in comic books published by Marvel Comics. The character first appeared in X-Factor #5 , created by writer Louise Simonson and designed by artist Walter Simonson...

    ; whether this included genetic alterations has never been clarified.

  • Iceman
    Iceman (comics)
    Iceman is a fictional Marvel Comics superhero, a member of the X-Men. Created by writer Stan Lee and artist/co-writer Jack Kirby, he first appeared in X-Men vol. 1 #1, ....

     (Bobby Drake): his supposed secondary mutation was greatly increasing his ice manipulation abilities, but leaving him trapped in his organic ice form and unable to transform back to flesh and blood. Many years ago, Emma Frost had previously shown Bobby a glimpse of these powers as he was able to live on as moisture. However, after the events of M-Day
    Decimation (comics)
    Decimation is the late 2005 Marvel Comics storyline spinning off from the House of M limited series. It focuses on the ramifications of the Scarlet Witch stripping nearly all of the mutant population of their powers, thereby reducing a society of millions to one of scant hundreds.This event, which...

    , where over 90% of the world's mutant population became depowered, Bobby is once more able to revert back and forth.

  • Black Tom (Black Tom Cassidy): Black Tom's original mutation allowed him to look like a normal human being with an ability to channel concussive blasts from wood. However, in Chuck Austen's Dominant Species storyline, Black Tom suffered a secondary mutation that left him as a half-plant creature with a lost sense of humanity.

  • Phoenix
    Jean Grey
    Jean Grey-Summers is a fictional comic book superheroine appearing in comic books published by Marvel Comics. She has been known under the aliases Marvel Girl, Phoenix, and Dark Phoenix and is best known as one of five original members of the X-Men, for her relationship with Cyclops, and for her...

     (Jean Grey-Summers): After the storyline The Twelve, Jean Grey somehow managed to transfer her telekinetic powers to Psylocke
    Psylocke
    Psylocke is a fictional character depicted in comic books published by Marvel Comics, most notably those comics featuring the superhero team the X-Men. The character has also appeared in licensed adaptations. Created by writer Chris Claremont and artist Herb Trimpe, she first appeared in the UK...

    , who also managed to transfer her telepathy to Jean Grey. For a time, Jean only had telepathic powers. However, when the NEW X-MEN series started, Jean's telekinetic powers had returned. Beast implied that it was the result of a secondary mutation for Jean. However, this appears to be retconned later, as it is revealed that at some unspecific point, Jean merged again with the Phoenix Force and that perhaps the Phoenix had given her back her telekinesis.

  • Toad
    Toad (comics)
    Toad is a Marvel Comics supervillain, an enemy of the X-Men. Created by writer Stan Lee and artist/co-writer Jack Kirby, he first appeared in X-Men #4 ....

     (Mortimer Toynbee): Toad's original powers have increased and he has gained additional powers through further mutation, including adhesive saliva, and a prehensile, elongated, protractible and sticky tongue. He also has gained the ability to extend his tongue great distances and ensnare objects and people. His tongue is superhumanly strong and tough to the extent that he once squeezed a magistrate of Genosha to death. He is also able to secrete an adhesive resin from his hands and feet that paralyzes the nervous system of any living organism that touches it. His tongue secretes odorless pheremonous venom that he is able to use to control minds to a limited extent. Toad also possessed the ability to psionically communicate with amphibian life (which he often uses as spies), and to expel powerful gusts of wind from his lungs capable of knocking someone down.

Suspected secondary mutations

Although never fully stated as a secondary mutation, some other mutants had shown abilities that were very different from their primary mutation.
  • Elixir
    Elixir (comics)
    Elixir , is a fictional character, a mutant in the and a student at the Xavier Institute. He first appeared in New Mutants, vol. 2 #5, and he is one of only a few students to retain his powers in the wake of House of M....

     (Josh Foley): Initially, when Josh's healing powers manifest, he looked like a normal teenage boy. However, after being brutally attacked by Wolfsbane, Elixir was forced to heal himself. The result of which, caused Josh's body to undergo a second, this time physical, mutation, turning his skin from flesh tone to gold. Later, Josh's powers undergo another change, with the revelation of his death touch, which also turns his skin black. Though this can be seen as the two facets of the same power to control human biological functions (both healing and killing) as opposed to just a healing power.

  • Wolverine
    Wolverine (comics)
    Wolverine is a fictional character, a superhero that appears in comic books published by Marvel Comics. Born as James Howlett and commonly known as Logan, Wolverine is a mutant, possessing animal-keen senses, enhanced physical capabilities, three retracting bone claws on each hand and a healing...

     (James Howlett): When Wolverine lost his adamantium skeleton, his body reverted to a more feral state, looking completely different than his human form. Whether this was a secondary mutation remains to be shown, although it could have been his body regressing as opposed to a mutation of sorts. It has been later shown that unlike other mutants, Wolverine constantly mutates.

  • Siryn
    Siryn
    Theresa Maeve Rourke Cassidy is a fictional comic book superhero appearing in books published by Marvel Comics, usually those belonging to the X-Men family of titles...

     (Theresa Cassidy): Siryn's secondary mutation first appeared in the new X-Factor series. Siryn is able to influence and control other human beings with her sonics, as well as cause them to enter a hypnotic state. Siryn can also cause the intended person to fall in love with her without regard to gender or sexual orientation and carry out her wishes and commands, like mythical Sirens.[32] Siryn once utilized this ability on Spider-Man, forcing him to divulge the truth about the Decimation of the mutants. It hasn't been clarified as to if she has developed a secondary mutation or has further developed her abilities.

  • Sharon Ginsberg
    Sharon Ginsberg
    Sharon Ginsberg is a fictional character, a mutant lawyer in the Marvel Comics Universe. Her first appearance was in X-Statix #2.-Fictional character biography:...

    (Sharon Ginsberg): Sharon's original power was her large bat-like wings that extended from the upper part of her back and were capable of allowing her flight. When they were removed, and Sharon awoke in a hospital, she manifested tough, sharp claws instead of finger nails and tough, sharp fangs instead of teeth, and advanced strength and speed levels. She was able to quickly flex and snap out of the restraints she was in at the hospital, and her claws were sharp enough to kill Solomon O'Sullivan. It is unknown though if this was a new mutation or simply part of her original bat-like mutation, to go along with her bat-like wings.
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