Sebastian Shaw is a mutant and adversary of the X-Men. He has the power to absorb kinetic energy and convert it into raw strength.
Shaw's background has been varied through is various incarnations. The main constant is that he eventually becomes extremely wealthy and affluent taking control of the Hellfire Club. Whether its under the guise of the Hellfire Club or his own scheme he wants to take over the world and be it's ruler.
His age is unknown with his mutant ability to absorb energy and store it keeping him young and strong or releasing it with explosive results.
Shaw at first worked with the Nazis in Poland as Dr. Schmidt using eugenics as a cover to discover mutants. In one of the concentration camps he comes across a young Erik Lensherr after killing his mother in front of him the anger unleashed Lensherr's magnetic power destroying his lab and killing officers. With the fall of the Nazis Schmidt goes into hiding.
Schmidt reemerges in the 1960's now calling himself Sebastian Shaw. Shaw still just as youthful as he was 20 years ago now had amassed wealth and influence with his Hellfire Club in Las Vegas. It's in the back room of this club that he meets with people in power with his inner circle. One of the people he meets with is U.S. Army Colonel Hendry trying to convince him to put missiles in Turkey to help spur war with Russia. Hendry who's initially completely against the plan is forced to play along with Emma Frosts telepathic control. Shaw later kills Hendry after being threatened with a grenade on his yacht. Using this as a chance to show Hendry his power he abosorbs the grenade explosion and then releases the energy on Hendry vaporizing him. Later that night he is attacked by a older Erik Lensherr and the CIA who have learned of his existence. Him and his club easily escape in their submarine heading to Russia.
En route to Russia Shaw decides to just send Frost and have her persuade the Russian general. He takes Riptide and Azazel and attacks the CIA base where Charles and Erik have gathered several mutants. The Hellfire Club easily overpower the CIA men killing most of them. Upon reaching the mutants he offers them the choice to join him and live like King and Queens or side against him and be in his way. Angel Salvadore takes him up on the offer and leaves with the club. The mutants try to stop this but Shaw just absorbs Havoks energy blasts and put's it inside Darwin forcing him to unsuccessfully contain it.
Latter after discovering Frost's capture by the CIA goes to Russia personally to convince the general this time without Frost's mind control.
With the Cuban missile crisis set the club maneuver under the sea in the submarine just to make sure that things go as planned and the US unleashes its nuclear arsenal against Russia. When the X-Men interfere he sends his men out to distract them while he absorbs the nuclear power from the sub. During this absorption process he is interrupted by Erik once again trying to kill him who inadvertently adds to his power by throwing various metal objects through the sub trying to impale him. Seeing Erik's power once again he tries to recruit him reminding him of the time in the camps and that humanity eventually will turn on the mutants. Erik would have none of it and takes out his helmet allowing Charles to freeze Shaw in place letting Lensherr send the same coin Shaw killed his mother over through his brain killing him.
Dead, he didn't lose entirely since Lensherr did listen and broke off from Charles forming his Mutant Brotherhood.
Sebastian Shaw also shows up in the 90's X-Men cartoon during the Dark Phoenix Saga. Closer to the original comics Shaw is tall and muscular and can only absorb kinetic energy using it to increase his muscle mass. As the leader of the Hellfire Club using Mastermind Jason Wyngarde to control Jean Grey and her Dark Phoenix persona. His plan is eventually undone by the power of the Phoenix and the X-Men.
During the final parts of Wolverine and the X-Men Shaw and his Hellfire Club return kidnapping Jean Grey once again trying to unlock the power of the Phoenix force. Using Emma Frost to break the mental barriers set up by Professor X.Once his use for Frost is over he orders her along with Cyclops killed now that the Phoenix was unleashed. In the ensuing mayhem the fate of his Hellfire Club is left unknown.
Shaw has delusions of grandeur and thinks of himself as a generally charming individual. This is all used to further his main goal of attaining massive amounts of power to control the world one way or another. Like all Hellfire Club members he dresses in the old england style with large collars and frill.
His power allows him to absorb energy. Though various incarnations have tweaked or expanded the "types" of energy and what he can do with it. In First Class he is shown to store all types of energy using it to keep himself youthful as well as release it into people causing them to explode. In the cartoons he is only able to absorb kinetic energy using it to increase his own mass and strength.