Eternal Soldier - Sebastian's body is become more and more in tune with the Super Soldier Serum. He is able to regenerate at an accelerated rate to the point that even bullet wounds heal in no time at all. The affects also touch on his ability to feel pain as endorphins react much more quickly than usual to the point that pain last a few seconds at the most. This is considered only the second stage of what the serum does to the body, the idea being the perfect soldier being able to receive damage and still fight on.