The two girls walked up to either side of the arena.
"In this corner, outrunning Super Saiyan god Goku backwards (just a joke calm the fuck down) and looking damn cute while she's doing it, Arelie!" Arelie ran up and jumped into the arena.
"And in this corner, princess of the night, though techniqually both she and her sister are queens, alicorn ruler of Equestia who's currently in her anthro body, Luna!" Luna, walking on two legs in her anthro alicorn pony form, flew down into the arena.
"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, Arelie looking over the tall alicorn woman, who stood over six feet tall and was already wearing nothing, Luna not seeming to understand why Arelie was staring at her chest so intently. "If the combatants are set," There was a pause, during which Arelie got into a running stance and Luna's horn began to glow faintly, "Begin!"
Arelie took off running, faster than Luna's eyes could follow. She ran in a circle around the anthro princess, leaving after-images of herself until the ring around her was a blur of movement. But thankfully, Luna didn't need to see her. Her horn glowed bright, forming a ball of moonlight that expanded outward around her. Arelie, unprepared for this, ran directly into the ropes of the arena, causing her to be shot through the air, sling-shot style.
Arelie was caught by Luna's magic and held in the air as her clothes were removed quickly with levitation.
"And Arelie has been completely undressed! Can the speedster get away?"
Arelie very decidedly could not get away. She could move her legs, but no matter how fast she did, was more pretty much just going nowhere extremely quickly. Eventually she got bored and held still. Luna grinned at this, using her magic to massage across Arelie's body to find all the sensitive spots. Aside from the usual spots, Luna found that Arelie's feet were very susceptible to pleasure.
With that discovered, Luna gripped Arelie's hips, buried her tongue in Arelie's pussy, and used her magic to massage her feet and grope her chest. Arelie squirmed and moaned, her legs quivering at the pleasure. The straw that broke her was the heat of Luna's glowing horn, which she felt against her clit before she moved her head forward and brushed her horn against the sensitive nub.
"And Arelie had reached climax! Luna is the victor!"
"That was fun." Arelie panted, smiling as Luna lowered her to her feet so she could walk with Luna back to her room.
"Looks like magic still beats speed. Next up is Launch vs Enchantress! The bipolar commando maid will face off against the magical villain, next time, in the last round before the quarter finals!"