How do I make the Dragons disapear in Lothric Castle, Dragon Barracks BF?

[Bright]

Ive explored under the bridge and got the sniper crossbow and I dont know how to make them disspear. They keep killing me.

[nxmt]

Jump down the bridge, head right. Past the knights up the stairs. Dash across to the other side and avoid the fire. Up the ladder there is a parasite mould thingy. Cheese it by hurling firebombs at it. Both dragons will die when it's dead.

[Angel Siegfried]

use a bow and shot in the legs of the yellow wyvern

[Xengre]

You can either snipe them with a bow or what I suggest is:
At bridge drop down to left, run through area up to building that leads to Outrider Frost knight but stop a bit before the cross roads where dragons breathe fire before they are aggro'd to gain stamina. Sprint across gap to other building you can enter. Take ladder up right immediately inside and kill everything aggro'd on you but do NOT go near dragon claw.

Now... either fight it melee or w/e you want or take easy method and throw a ton of firebombs at it (or bow) from safe distance. Killing this black thing (can lock on after it becomes big, just melee it once or twice and run back) will instantly despawn entire dragon upon killing it. Same for other one (it remains even if dragon is a corpse but killing it removes corpse as well and lets you access some stuff (one or two drops or something, forget). Note: Killing one dragon auto kills the other hence the corpse of the left dragon remains.

[juicy]

You don't actually need to kill the pus of man if you don't feel like it. The dragons die once you activate at least one of them.