Tremain was a mutant captured and studied by the Mandarin. On a secret mission, the Six Pack attacked the secret base Tremain was held in. Tremain had severe injuries, and Cable tried to save him. Cable used his telekinesis to keep Tremain's body together, but was forced to give him a blood transfusion. Although it seems he survived this trauma, Cable seemed to think Post had later died.

Years later, Tremain resurfaced as Post, the lowest of Onslaught's emissaries. Onslaught forced Gateway to teleport Cyclops, Storm, Iceman, and Wolverine to where Post could 'test' them. The four managed to defeat Post and were transported back to the Mansion.^[1]

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 later was one of the mutants attacking Senator Robert Kelly. He was killed by Pyro, who then succumbed to the Legacy Virus.

Powers and AbilitiesEdit

Powers

Tremain was a mutant further altered by his exposure to Cable's techno-organic virus, possibly by the Mandarin, and lastly by Onslaught. He seemed to have superhuman strength and durability, as well as a high level of intelligence.

Post had several armored detachable plates on his body. They allowed him to cloak and teleport. they could act as scanners, form energy blasters, and counteract another mutant's power. For example, after an attack by Iceman, Post conducted heat that traveled through the ice to Iceman's body.

Post connected himself to the surrounding area when confronting the transported X-Men. While this apparently makes him more powerful, Cyclops, Storm, Iceman, and Wolverine were also able to harm him by attacking the area rather than directly attacking him.

Onslaught provided Post with a psionic screen preventing others from reading his mind and hiding information about Onslaught. Tremain also telepathically communicated to Cable while attacking him.

Power Grid ^[2]