O fenômeno é conhecido como mutação secundária. Este é um fenômeno que entre os mutantes parece inexplicável, com muitos personagens mutantes previamente estabelecidos desenvolvendo subitamente poderes novos ou vastamente expandidos
Alguns dos mutantes conhecidos com mutação secundária são:
Gambit (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.
Polaris (Lorna Dane): after having her mutant powers leeched by her supposed-sister, Zaladane, Lorna developed the first recorded case. Her body mass had increased, along with her strength and resistance to injury.
Emma Frost: Emma's secondary mutation activated in the midst of the bombing of Genosha by Cassandra Nova's wild Mega-Sentinels. She transformed into an indestructible organic diamond form that saved her life, but negates her telepathy so she cannot use both powers at once
Existem muitos mais. Siga este para encontrar mais detalhes