Uncanny X-Men (1981) #190
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Characters
Adam Warlock is an artificially created human who was born in a cocoon at a scientific complex called The Beehive.
Bitten by a radioactive spider, high school student Peter Parker gained the speed, strength and powers of a spider. Adopting the name Spider-Man, Peter hoped to start a career using his new abilities. Taught that with great power comes great responsibility, Spidey has vowed to use his powers to help people.
Ororo Monroe is the descendant of an ancient line of African priestesses, all of whom have white hair, blue eyes, and the potential to wield magic.
Growing up in a wealthy Brazilian family, Roberto da Costa was forging a career as a skilled soccer player until his mutant nature manifested during a match.
The metal monstrosity called Ultron created the synthetic humanoid known as the Vision from the remains of the original android Human Torch of the 1940s to serve as a vehicle of vengeance against the Avengers.
When Janet Van Dyne's father died, she convinced her father's associate Hank Pym to give her a supply of "Pym particles"; Pym also subjected her to a procedure which granted her the ability to, upon shrinking, grow wings and fire blasts of energy, which she called her "wasp's stings."
Feared and hated by humans because they're different, the X-Men are heroic mutants, individuals born with special powers who've sworn to use their gifts to protect mutants as well as humans.