Powers: Butler's armor was a new version of the original Sentinel's exoskeleton, which gave him increased strength, speed and flight capability. The armor also contained wrist blasters and force field generators.
Bio: For reason that was not revealed, Marcus Langston was removed as the field leader of Team Youngblood and replaced by a younger version, Sentinel II, who came directly from the Bloodpool program.
Sentinel II didn't last long. He died trying to kill Crypt by blowing up his nuclear powered exoskeleton while he held on to Crypt.