Win by making your opponent submit after orgasm
The aroma from the aphrodisiac-laden oils filling the oil pit was so thick in the air within the arena that it was almost visible, tinting the lights filling the arena with a faint pink color. Everyone in the audience watching the match fidgeted in their seats in anticipation, especially as the intoxicating aroma got them all hot and bothered and eager to see some action. They didn't have to wait for long, as the lights dimmed and exotic middle eastern music began playing over the speakers, signaling the arrival of the first fighter for this match, the audience's favorite erotic goddess.
Spoiler
The audience roared as Ishtar tossed her top aside. When she first joined the league she was quite shy about exposing her breasts, primarily because she didn't know how people would react to her cookie-sized areolae and nipples as thick as thumbs. Luckily it seemed that both her audience and her opponents really enjoyed them. Ishtar wondered how her opponent for tonight's match would react, a little flutter of uncertainty in her heart as she stepped into the oil pit. She didn't think much about it though, the aphrodisiacs in the oil she rubbed into her skin and the intoxicating scent from the oil pit quickly distracting her from such thoughts.
Ishtar took a few deep breaths, taking in as much of the aphrodisiacs as she could to both acclimatize herself and to fuel her insatiable desire for love. When she opened her eyes, all her uncertainty from before had disappeared. She was now the Goddess of Love, eager to share her love with Zoe and give her opponent the best night of her life!