As a demon bearing the Mark of Cain, Dean's strength was multiplied from the time he was a human, allowing him strength on par with, if not greater than, the Knights of Hell. His demonic powers also included a degree of telepathy, being able to read an individual named Lester's mind and learn his history with Sam upon meeting him. During his time as a demon, Dean also possessed the ability to easily regenerate from wounds and as his corrupted soul was possessing his own body, he was exempt from exorcisms that plagued other demons.