Ok so I got the drake sword. cleared the stair tower of the black knight, defeated the gargoyles. coming back to the bridge a friend told me if you go the tower where the black knight was. and shoot a arrow at the dragon he will fly off and you will be awarded 10,000 souls. every time I go up the tower though he is not there and when I go down I hear him roaring, and when I go under the bridge he's still there. he told me to exit game if that happened so I went to a bonfire, exited game. went back. he's still not there. is it glitched?