Corrected entry: Durza the Shade is easily able to heal a hole through his head in one part of the movie. However later he has scars around his mouth, but he doesn't heal them, when earlier on it was evident that he is able to to heal his wounds.
Twotall
30th Dec 2006
Correction: Durza has more than scars around his mouth, he is also noticeably emaciated, paler and has grayer hair. All this points to that the powerful magic he has used against Eragon (and to heal himself) is taking it's toll; he is being drained of his resources.
Twotall