The two combatants walked up to either side of the arena.
"Time for the first round of the semi-finals folks! And let's kick it all off with a bending battle!"
"In this corner, water bending master of the south pole who would last about five seconds on a google image search of herself before losing all of her innocents, I fucking timed it, Katara!" Katara walked out onto the stage, waving to the crowd.
"And in this corner, water bending avatar who's elemental skills makes it just about even with the fact that she's up against the woman who taught her water-bending (supposedly, I mean she was already bending as a toddler), Korra!" Korra jumped into the arena, waving excitedly.
"Alright ladies, just a refresher on the new rules: the name of the game is making your opponent cum, preferably hard, by any means necessary, that still hasn't changed. Weapons, magic, special abilities, and summoned helpers may all be used. Full on combat is also allowed in order to make the opponent submit, just try not to kill anyone, and if it must come down to it, if your opponent tags out, you let them up. Alternate forms are also allowed to be used, basically any version of the character that exists may be used. The winner advances to the next round, the loser is disqualified, and the loser spends a full week as the winner's sex slave."
Both girls nodded, both grinning at each other. Korra wasn't used to seeing Katara like this, it was going to be fun. "If the combatants are set," There was a pause, during which both girls entered a water bending stance, "Begin!"
Both girls sent water at each other, which the other dent to send back, and just like that they were playing Pong. The two were caught in a stalemate of water-bending, evenly matched. Korra stomped her foot, sending shifting earth at Katara, who jumped into the air to avoid it, firing several icicles at Korra. Korra countered with a blast of fire from her knuckle, sending a second blast after it at Katara.
The second blast hit Katara. Her water doused it quickly, but it still had the time to burn off the top half of her clothing, revealing her decently sized tits. Korra licked her lips, getting the same look in her eyes that Aang usually got when he wanted her. Or at least that's what Katara believed to see. Korra formed an air-scooter, rushing Katara, who formed several water tendrils and sent them at her.
Katara jumped up from the air-scooter, parting the tendril that went up at her, and shooting a blast of air down through it. The air knocked Katara to the ground without really hurting her, simply keeping her down long enough for Korra to land and begin removing her remaining clothes. Korra grinned at the sight of Katara's naked body, forming rock shackles around her ankles and wrists to keep her from bending.
"You were taught well." Katara said with a smirk. "Had a great teacher." Korra replied, removing her bottoms and forming a strap-on out of ice, lining up to Katara and thrusting into her pussy without warning or hesitation. Katara cried out, squirming against Korra's movements. Katara got off more on gentle, passionate motions, like how Aang always was with her, but Korra's rough treatment was enough to get her off as well, and she reached the edge in only a few minutes.
"Katara has reached climax! Korra is the victor!" Korra released Katara, who got shakily to her feet. "I..take it you..and Asami will be keeping me for the week?" Katara panted, Korra nodded with a grin, eager to fuck her old teacher senseless.
"Fear the next generation folks. Next up is only other match of the semi-finals, Enchantress vs Raven! From a match between benders to a match between two magic users, next time on Yuri Tournament!"