The two combatants walked up to either side of the arena.
"In this corner, now dawning her iconic Batman the animated series form, still the sexiest voice she's ever had if you want my opinion, Harley Quinn!" Harley Quinn, in her animated series form, stepped into the arena, waving to the adoring crowd.
"And in this corner, still in her usual Teen Titan's form, probably because it's both the most well known and most effective for this kind of contest, Raven!" Raven floated over the edge of the arena and landed gently on her feet with seemingly little effort.
"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 may be used, same goes for special abilities. 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. Now 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."
The two girls nodded, Harley Quinn pulling her mallet seemingly out of thin air, Raven not moving a muscle. "If the combatants are set," There was a pause, during which Harley Quinn first posed for a picture with both hands on her mallet before hefting the weapon over her shoulder, and Raven's eyes and hands became covered in a dark magic aura, "Begin!"
Raven started off simple, firing off a small magic bolt. Harley swung her mallet, nailing the bolt and sending it back at Raven at twice the speed she had thrown it. Raven put up a shield, defending against the return projectile, only for Harley's mallet to smash against the magical barrier the moment after the bolt collided. This left Raven in a bad predicament. Her magic would make dealing with Harley rather easy, but if tried to use it for another other than the shield, the shield would break on the very next hit and Harley's mallet would hit her.
Raven didn't know if she could remain conscious for that strong a direct strike, nor was she certain that her magic tendrils could grab Harley before the cartoonishly large and fast weapon collided with her. Raven took a deep breath, focusing on her shield, and waiting. A few moments later, she forced the shield to expand the moment that Harley rose her mallet again, pushing the crazed clown girl back far enough that she could drop the shield safely.
Harley didn't seem to think that anything about this would end badly, and just rushed Raven again, getting caught almost instantly in Raven's dark magic tendrils. Raven smirked, her tendrils ripping Harley's clothes off, holding her hands behind her back, covering her mouth, and forcing her legs open in a just a few seconds.
"And Harley is completely naked and bound! Can she escape this?"
Harley squirmed, but the magic binds couldn't be broken, not by Harley in her current state. Raven moved between Harley's legs, opening her cloak, lowering her uniform, and casting the spell that gave her a magic cock. Raven licked her lips, grabbing Harley's hips and thrusting hard into her tight pussy. Harley groaned against the magic gag, which began to push inside her mouth and throat to further make her submit.
Harley tried to resist or escape, or at the very least hold out until Raven came first, but Raven had control over her magic cock spell, and currently had it set to only half pleasure. To make sure Harley came first, she formed a second magic cock and forced it into Harley's ass, which shockingly seemed to be virgin. Harley gagged hard, her eyes rolling back as she came hard.
"And Harley Quinn has reached climax! Raven is the victor!"
Raven released Harley, only for her to immediately cry, "Don't stop!" Raven was confused for a moment, watching Harley squirm, "It felt so good, put it back in my ass! Please!" Harley begged. Raven grinned, promising Harley she'd fuck her ass with both magic cocks at once when they got back to her room, and Raven would go up to full pleasure so she could test how much cum she could pump into her tight hole.
"Looks like magic beats madness folks! Next up is Korra vs Mystique! Can the Avatar bring down the shape-shifter? Or will the mutant soy dismantle bridge to the spirit world? Find out in the next round of Yuri Tournament!"