Fortunately for him, the dragon's youth and inexperience finally seem to have caught up with it. Maddened by pain and anger, he's clearly reverted to the more bestial state that white's are normally found in, and thus misses the perfectly set up attack. The tip of the sword strikes home, and, with his magically assisted strength, Caiphias actually manages to drive the blade clean through the dragon, and out its back. The dying dragon continues to claw and snap furiously for a minute or so, likely scoring a few hits on him, before, finally, giving up the ghost.