Plot Hole
After he was wounded and he realized that he is imortal because his wound does not heal how is it possible that his fist where the blades comes out are stil healing like before.
It does not make any sense.
The same way a blade can go clean through someone and come out of their body with not a spot of blood on them; it's a limitation enforced on them by the MPAA to secure a PG-13 rating. Had it been an R-rated film from the beginning they may very well have had him running through the movie wit bloodied hands the whole time, but as a PG-13 movie they can only get away with small uses of blood here and there. So it's not necessarily the movie's fault.
share*beep* MPAA... on the other side if the world was run by MPAA there would be no violence, blood, rape, abuse... anything bad really. Just saintly people doing saintly stuff.
On the other hand... that sounds boring.
Those are my principles, and if you don't like them... well, I have others.