The Warden - Borderlands 3 Farming Guides

Location: The Anvil on Eden 6
Part of: Hammerlocked Story Quest
Drops: Freeman (Atlas RPG) and Plaguebearer (Torgue RPG)

The Warden is the end boss of The Anvil area on the planet Eden 6. You face him during the Hammerlocked Story Quest where you have to free Hammerlock. Once you've defeated The Warden once all you have to do is enter the area you faught him in the time before to fight him again.

As far as loot goes, Freeman (Atlas RPG) and Plaguebearer (Torgue RPG) are both on The Warden's dedicated drop list. Both of these weapons are unique to The Warden as well which means that it's very unlikely you'll find them elsewhere in the game, The Warden has the closest thing to a monopoly on the drops there is.