Avengers: The Initiative (2007) #20
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Earth's Mightiest Heroes joined forces to take on threats that were too big for any one hero to tackle. With a roster that has included Captain America, Iron Man, Ant-Man, Hulk, Thor, Wasp and dozens more over the years, the Avengers have come to be regarded as Earth's No. 1 team.
Taskmaster first exhibited his unusual ability, called "photographic reflexes," which allowed him to mimic the motion of anyone he saw, when he was a young boy.
Although she was able to use the cat's-head amulet to change back to her human form, Greer Nelson became so accustomed to and enamored of her feline form that she seldom made the transformation.
Terrance Ward was drafted into the Initiative training program because of his telepathic and shape-shifting abilities.
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."
After brilliant scientist Henry Pym discovered a process in which he could manipulate a newly discovered group of subatomic particles through magnetic fields, he tested the serums on himself and accidentally shrunk himself to the size of an ant.