Post

Post was a supervillain from Marvel comics and a prominent enemy of the X-Men, like many opponents of the X-Men he was himself a mutant but was further enhanced by the same techno-organic virus as Cable, which he obtained after Cable gave him a blood transfusion to save his life prior to his days as a villain.

History
born Kevin Tremain little is known of the early life of the man who would become Post prior to his introduction to Cable, where he was showb as a mutant captured and studied by the Mandarin. On a secret mission, the Six Pack attacked the secret base and came across a badly injured Tremain, Cable used his telekinesis to keep Tremain's body together, but was forced to give him a blood transfusion to save his life, though due to trauma he did not seem to recover and Cable believed (wrongly) that the mutant had died.

Years later, Tremain resurfaced as a supervillain known as Post and became the lowest of Onslaught's emissaries (in effect a grunt soldier). Onslaught forced Gateway to teleport Cyclops, Storm, Iceman, and Wolverine to where Post could 'test' them via brutal combat but the four managed to defeat Post and were transported back to the Mansion.

Later, Post attacked Cable. Cable instantly recognized him as Tremain. Post defeated Cable and left him for the Hulk to finish off.

Post was later charged with ensuring the Sentinels would launch, and did so. He and his master Onslaught were eventually defeated by the heroes.

Post would then resurface was one of the mutants attacking Senator Robert Kelly during the events of "Dream's End" but was killed by Pyro, who had grown tired of the endless war between human and mutant and wished to save Kelly so the Senator could end the conflict - Pyro, who was suffering from the Legacy Virus, then succumbed to the strain caused by killing Post and died in Kelly's arms.