Super-soldiers

Superhumans, Adams, an extraterrestrial-human hybrid created by Colonists.

History
With nearly every Syndicate member dead, the Colonists began to clear up any evidence of alien life and began to create human replacements called "Super Soldiers," on which the Colonists had been working covertly as an alternative slave race should the hybridization experiments be unsuccessful. The process in creation of a Super Soldiers, the Colonists infect humans with a new strain of their virus, which slowly destroys and then rebuilds the body of the host. This process seems to involve a lengthy surgical procedure on abductees as opposed to simple infection (as with the black oil). As they have normal red blood and can replace individuals within powerful positions, they provide an ideal way for the Colonists to infiltrate humanity to ensure that the plans for colonization are uninterrupted. They are identifiable however by small spiny protrusions on the backs of their necks or by detailed analysis of a blood sample which shows their DNA exists as a complex with iron. Although they cannot shapeshift, Super Soldiers are practically unstoppable. They can survive being crushed by a garbage compactor, decapitation, and can rip through steel with their bare hands. The only known way to kill them takes advantage of their metallic biochemistry: their bodies are torn apart by the magnetic fields present near large deposits of magnetite ore. The Super Soldiers quietly fill the positions of power previously occupied by Syndicate members and rarely use human conspirators. By the end of the series they virtually replaced the Syndicate and were successful in chasing Mulder and Scully out of the FBI so that they can no longer investigate the X-Files and interfere with their plans. They are currently preparing for the final invasion in 2050.

Behind the Curtain

 * The X-Files found out that the Soviet Union was working with extraterrestrial life.