I've just beaten the Taurus Daemon in Undead Burg and after that encountered a bridge guarded by a red dragon and some Hollow Warriors. I've found a way to sneak under the bridge through a stairway around the middle of the bridge.
From this point, I can fire arrow and hurt the dragon, and it doesn't seems to be able to hit me back. With my bow and arrows, I deal around 15 hit point at a time. Can I kill the dragon this way? If yes, how many hit points do the dragon have (so that I can estimate how many arrow I need for this)?
What will be the reward?
Should I just continue on my journey, and eventually the dragon will move aside and allow me to cross the bridge?
Best Answer
The Bridge Wyvern is the official name of this dragon. As far as I know, it will never re-locate and will impede your passage on one end of the bridge or the other.
On the first playthrough, the Wyvern has 2208 HP. It would take you a while to pelt him down with arrows, but it is viable. If you're only doing 15 damage, it might be a good idea to check you meet the minimum stat requirements of the bow you're using as there's a damage and attack speed penalty if your parameters are lower.
That being said, the Bridge Wyvern is highly prone to glitching, and dying as a result. As mentioned on the Dark Souls Wiki, here are some methods of causing him to glitch and die, as well as how to safely kill him with arrows:
Ways to kill the Hellkite Wyvern without endangering your character:
There are numerous other ways that the dragon could glitch and die. I have also caused it to glitch during soul farming - I would repeatedly trigger his fire attack to kill the enemies on the bridge and go back to the nearest bonfire to reset the monsters.
In terms of rewards - You receive 10,000 souls for his death. If you keep shooting his tail, it will eventually be cut off and you'll be rewarded with the Drake Sword, a 200 damage base sword that is good for starters. I suggest doing this before killing him.