After you have found the Crit for the third time, and Mordecai botches the roll, the Crit becomes this foe. He is much hardier than the other Orcs you have faced. He seems to me around the level of Badass but without the Prefix.
He will largely just run in and try to slash you. Still, he will occasionally leap into the air and try to come down on you. Keeping on the move will make this fight a lot easier.