Coldsteel (Marvel)

Coldsteel (formerly known as Joseph Stalin) is a super-villain from Marvel comics, originally the Marvel universe's counterpart of the real world dictator Stalin would ultimately be transformed into a demonic villain due to the machinations of Satannish.

Pre-Death (Joseph Stalin)
prior to becoming Coldsteel Stalin was an infamous dictator in World War II, despite this he would ultimately aid in defeating Adolf Hitler and the Nazi Empire, though he would later take over as a major figure in the formation of the Soviet Empire and a new age of unrest across the world.

Resurrection (Coldsteel)
due to the many atrocities Stalin was part of in life he would become a spirit in the realm of Satannish, the hell-lord would eventually have use for Stalin and allowed him to live again as the demonic Coldsteel, a super-villain capable of standing toe-to-toe with many superheroes and an enforcer of Satannish's will.

Appearance
as Coldsteel Stalin has an inhumanly large, powerful body made out of living metal - his is at minimum 9ft in height, as a spirit he can likely take other forms but is limited by the physical form that Satannish decides to grant him.

Abilities
as of his resurrection as Coldsteel Stalin gained superhuman size, strength and durability - he was also effectively immortal, since even if his physical form was destroyed his life-force would simply return to Satannish and could be returned at any point should the hell-lord have use for him.