With the dragon down you can now venture up to the top of the stairs and collect a Club, Ember, Raw Gem, Large Soul of a Deserted Corpse and a Claymore. If you don’t have a bow you can find one near the beginning of the High Wall of Lothric area. If you account for a few misses or if you went with a different character build you may want to be fully stocked with ammunition before you take on the dragon. Averaging about 43 damage per arrow, it took about 50 arrows before the dragon flew off. When this happens you will earn yourself a Large Titanite Shard.
You need to inflict just over 2,200 damage before the dragon will fly off. The head always lowers to the exact same spot and remains there long enough for you to fire an arrow. The dragon follows a couple of different patterns, but will lower its head after every one or two fire blasts depending on the current pattern. Simply stand on the wooden platform halfway up the stairs where you won’t be hit by the dragon breath, and aim your bow or preferred ranged weapon at the dragon’s head. If you’ve got some time on your hands and a ranged weapon with a lot of ammunition (preferably a bow or crossbow), you can take down the dragon. You can also check out other areas in our Dark Souls 3 walkthrough and guide.
Be sure to check out our full walkthrough of the High Wall of Lothric area, including the boss battle against Vordt of the Boreal Valley.