Iron Curtain was created by Bob Layton in 1986 and first appeared in X-Factor Annual # 1.  

Story Arcs

Firefox was hired to retrieve Darkstar, Vanguard and Ursa Major after they escaped a special research facility. Firefox located a safehouse with Darkstar, Stencil, Concussion, Iron Curtain and Mentac inside. Firefox raided the safehouse and killed Iron Curtain when he fired a grenade into his mouth. 

Powers & Abilities

Iron Curtain possesses superhuman strength and resistance to injury. His outer body is invulnerable to most attacks including gunfire from various firearms.