Groo has slain entire armies with nothing more than his swords, which appear to be a pair of katanas. Groo loves these frays, as he calls them, and often charges into the melee with a cry of "Now Groo does what Groo does best!" He is indiscriminate in the use of his battle skills, usually leaping into the bloodshed before attempting to ascertain the reasons for the fight, or even who is on what side. Even when Groo does join battle intending to fight for a particular side, he is prone to forget which side he is on or be tricked into fighting his unfortunate allies, often causing him to utter "Did I err?" in confusion once everybody is dead.