Found on the bridge to Irithyll of the Boreal Valley.
You will encounter another two in an area beyond an illusory wall in Irithyll of the Boreal Valley. Descend a long ladder into an open area of shallow water to find them. After defeating them both the Ring of Favor will drop and the Water Reserve bonfire will become available. Use this bonfire to access Archdeacon McDonnell to level up in the Aldrich Faithful Covenant.
- Very susceptible to bleeding; perhaps the most luxurious way to kill the first one you encounter is with Gnaw, which causes bleeding in one or two casts for a percentage of their health. Dorhys' Gnawing causes bleed in a single cast, and while isn't available until after the first beast on the bridge, is invaluable for dealing with the encounter with the two beasts in the Water Reserve bonfire.
- Can be poise-broken for a critical attack.