The Super-Skrull (Kl'rt) is a fictional character that appears in comic books published by Marvel Comics. The character first appeared in Fantastic Four #18 (Sept. 1963) and was created by Stan Lee and Jack Kirby.
Kl'rt - more commonly known as the Super-Skrull - hails from the Skrull capital world of Tarnax IV (in the Tarnax System in the Andromeda Galaxy) which has since been destroyed by Galactus. The Skrull Emperor Dorrek VII wanted revenge against the Fantastic Four, who thwarted the Empire's attempt to invade Earth. Dorrek handpicked the warrior Kl'rt, who was artificially augmented and given the combined abilities of the Fantastic Four. Kl'rt's power levels, however, exceeded the originals -stronger than the Thing; superior flight and greater pyrokinetic ability than the Human Torch; better control of invisibility and telekinesis than the Invisible Woman; and an ability to stretch beyond that of Mr. Fantastic. The newly-named "Super-Skrull" also retained his innate Skrull shapeshifting abilities and strong hypnotic skills. He was then dispatched to Earth to defeat the Fantastic Four and pave the way for a renewed invasion by the Skrull Empire.
During their first encounter, the Super-Skrull keeps the Fantastic Four at bay with his superior powers. However, Mr. Fantastic correctly guesses that Kl'rt's powers are augmented by an energy beam directed from the Skrull home world. Blocking the beam deprives Kl'rt of his new powers and he is quickly defeated, returning to the Skrull home world in shame. He returns to Earth in the guise of the Invincible Man, to fight the Fantastic Four. He returned to the Skrull home world in exchange for Johnny Storm and Sue Storm's father, Franklin Storm. The Super-Skrull was also among the villains summoned by Doctor Doom to attack Reed and Sue at their wedding. He is sent back to Earth time and again, and battles other heroes such as Thor, and Captain Marvel. The Super-Skrull also acts as the Empire's agent on Earth during the Kree-Skrull War, and manages to temporarily disband the superhero team the Avengers and kidnap Mar-Vell and the Avenger siblings the Scarlet Witch and Quicksilver. With the war ending in a truce, the disgraced Super Skrull later sides with the Titan Thanos and alongside Skragg aids Thanos in his quest for the Cosmic Cube. The Super-Skrull attempts to capture Rick Jones for Thanos, but winds up fighting Mar-Vell and the Thing. The hero Mar-Vell, however, defeats both the Super-Skrull and eventually Thanos. After a skirmish with Spider-Man, the Human Torch, and Ms. Marvel, Kl'rt becomes trapped in the Van Allen radiation belt.
Years later a Canadian research team accidentally pulls Kl'rt back from deep space, and he promptly slaughters the entire group, with the exception of physicist superhero Sasquatch. Kl'rt also discovers that the time in the radiation belt has given him cancer. Sasquatch is initially defeated by the Super-Skrull, but eventually manages to trick him, converting the Super-Skrull into a stream of dissociated particles and transmitting him back into deep space. The Super-Skrull is later freed by the Silver Surfer, and discovers that his cancer has gone into remission. This is apparently caused by a "chronal anomaly" in the area of space Kl'rt occupied, which reverted his cellular makeup to a healthy, pre-cancerous state.
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Official Site: Marvel
Links: Super Skrull Wiki Entry Marvel Directory Entry Marvel's Super-Skrull Profile