The two girls walked up to either side of the arena.
"In this corner, currently rocking a sexy as hell triple D anthro body, alicorn princess of the night herself with the power to read dreams, princess Luna!" Luna descended into the arena from the sky.
"And in this corner, most magical bad guy I've ever seen, at least in the Marvel universe, lord only knows why she agreed to join this sex based tournament, Enchantress!" Enchantress appeared in the arena with magical teleportation.
"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, Luna giving a polite, regal bow to Enchantress, who smiled smugly and very pointedly did not bow back, making Luna glare at her. "If the combatants are set," There was a pause, both women beginning to glow as their magic began to charge up and take a dark blue and green color for Luna and Enchantress respectively, "Begin!"
Both girls let out a blast of intense magic. It collided in the middle of the arena, causing a massive multi-colored explosion to form in the center, sending out a wave of force that blasted them both back. Both just barely avoided getting thrown from the arena with flight. Well, flight for Luna and levitation for Enchantress. Both then rocketed into the air and tackled each other, each trying to overpower the other.
Luna, with the strength of an earth pony, threw Enchantress down, where she smashed hard into the stone floor of the arena. Luna landed hard on top of Enchantress, and began using her magic to levitate Enchantress' clothes off.
"And Enchantress has been completely undressed! That's farther than anyone else has gotten against her."
Enchantress groaned as Luna began using her magic to massage her body. She grit her teeth, magic blasting Luna into the air. She hadn't regained her composure when she landed, and was dazed by the fall. Enchantress went over, lifting one of Luna's legs and moving her hips forward, grinding their pussies together hard. Luna groaned softly, barely conscious of anything as she began feeling the pleasure.
With her slight concussion, Luna couldn't quite remember that she was meant to avoid getting off, and began moving her hips as well, moaning as the two rubbed against each other. Enchantress, seeing that Luna's horn had began glowing, a reflex to try healing herself, she reached over, gripping Luna's horn and stroking it as she bucked her hips forward.
Luna moaned louder, her climax speeding up even faster. Her mind fully returned to lucidity the same moment she came.
"And Luna has reached climax! Enchantress is the victor!"
Enchantress bound Luna in magical chains and began leading her off, "You're a cruel user of magic." Luna muttered, seemingly amusing Enchantress.
"And that's another victory for Enchantress! That's all for the quarter-finals, but before we move on to the semi-finals, we'll take a look back at the victors of these round, next time on Yuri Tournament!"