About halfway through the fight, he takes a huge axe and chops off one of his hands, and then shoves it into a dead dragon's head and the dragon head becomes part of his arm and he shoots fire all over the place
That moment, and then when it points to the sky and throws that blast of fire, along with the soundtrack starting to play, God, it's amazing. I almost didn't mind him killing me about 6 times before I could beat him, haha.
Ya, it was such an epic moment. I am really looking forward to more of these fights.