Unus was a member of Magneto's initial lineup of the Brotherhood of Mutant Supremecy, battling the X-Men and the Ultimates on different occasions. He was killed in the Savage Land by Thor. Despite using his powers to create unbreakable shields around him, Thor's enchanted hammer Mjolnir shattered the shield and killed him.
Powers and Abilities
Repulsion Field: He could generate an invisible psionic field around himself. This field could deflect and stop objects or projectiles. He could also use this field to move or push people or things.
Mind Control: He had the ability to control the minds of others upon mere concentration.
Psi Link: He had the ability to develop a mental link with a person under his control.