N-R-Gyatt!

The two fought and they clashed against one another. The speedster too quick for the Legionnaire; the Legionnaire too bulky for the superheroine. Both in a stalemate due to their abilities. Maximina slammed into a brick wall and slumped before being walloped by N-R-Geez! who's fist barely even left a dent in her armor. The Roman Larper growled then touched the middle of her chest. A panel opened up and a flash of technicolor light bathed N-R-Geez!

"Hahah, you've been doused by the Light-Stone of Venus. A relic I have plundered from the tombs of Italy! Prepare to become entranced by the powers of the stone!" The supervillainess guffawed.

The speedster jumped back and braced herself. Whatever whammy that she was hit with could potentially be bad. She waited, and when nothing occured, she hoped that this was a fluke. She was proven wrong when her leotard tightened around her back. N-R-Geez’s hands fly back on pure reflex, fingers hooking under the already-straining crotch of her leotard as the fabric was yanked mercilessly upward between her cheeks. The wedgie was sudden, and brutal, intrusion on her body.

“WHAT—?!”

She twisted around, trying to look over her own shoulder, and the view that greeted her made her eyes go wide. The tight hot-pink material that used to hug her athletic ass was now being stretched out. The fabric disappeared into the deepening cleft as her rear expanded outward and upward. Each second added more soft, heavy mass; the once-firm super glutes were ballooning into a new and strange shape.

“The hell is this?!” she snapped, her voice crackled between outrage and disbelief. She yanked harder at the wedgie, but the fabric only sunk deeper as her ass keeps swelling. The material shrieked in response.

"That ray was supposed to make you fall into slavish devotion to me." Maximina's voice creaked through her armor's speakers. "I don't know what I just did."

“‘Lady, the only thing falling right now is my dignity!” She tried to take a step and nearly stumbled as another surge of growth hit. Her heart shaped ass still kept its form but just widened and thickened into an absurd shape. The fabric dug deeper between the expanding cheeks, the wedgie now so intense it forced her to stand with her knees slightly bent. The once confident superheroine's face was flushed red, her hands moving across the surface of her bottom.

“Venus stone, my ass! That was some weirdo perv stone!” She glared at Maximum, cheeks burning as bright as her hot pink costume. “Fix this Or I swear the second I can run straight again I’m dragging you by your neck and take you straight up to Mt. Olympus!"

Another heavy pulse of growth filled her body. The leotard’s thin material groaned; the high-cut leggings she wore were now cutting deep into the soft, swelling flesh of her thighs as her hips began to widen in conjunction with her bottom. N-R-Geez’s confidence was gone; she was forced into an awkward, half-bent posture. One hand still clawing at the relentless wedgie while the other tried to keep her balance against the new, embarrassing weight tugging at her backside.

“This is not funny,” she growled, though with each second of her costume pulling at her backside, the threat sounded less intimidating and more flustered.