Arguk the Butcher

Arguk the Butcher is the boss enemy at the end of the side quest Critical Fail given to you by Moxxi in Flamerock Refuge after chasing thugs out of her club. He is orc-like in appearance with swords for hands, and appears when Tiny Tina transforms the gun after Mordecai rolls the third successive critical fail.

Strategy
Face him basically the way you would any orc, he isn't much more powerful than a regular orc, he just has swords for hands.