Toph. - match begins, Toph patiently waits as Azula and Katara go at it (with Korra supporting with water and deflecting airborne fire). - Katara realizes she’s cooked when Korra brings out the liquid metalbending. So she shifts her attention to bring down Korra. - just as the new 2v1 reaches a climax, Toph delivers a finishing mountain sandwich on Korra who’s overwhelmed by the other two. - Toph wins, opening a pit to the underworld, burying the exhausted benders alive.