Triss Merigold (Witcher) found her powers limited to piss?

"You'll pay for crossing me."

Triss glared at the bandits who thought they could ambush her on the road. Magic charged in her hand, building power. Rage fueled the energies flowing through her body. It burned hotter, snaking up her wrist, past her shoulder, pooling in her chest and lower.

"Get ready," she snarled, "to learn why you should never piss off a sorceress!"

With a wave of her arm and a bellow, Triss released everything. But not the everything she had in mind. Her scowl lingered, creeping up her lip as she proved her very point... by pissing herself.

At first, it looked as though nothing happened, beyond a strange redness on her cheeks that darkened closer and closer to match her hair. A tear of shame shed from her verdant eye, then her nose crinkled as an acrid stench filled the air. The outcome of her attack only became clear outside of her when she started dripping from between her legs. It leaked through the seams in her pants to make a puddle while it warmed her crotch.

It may have looked, simply, like Triss had somehow wet herself and failed her spell. The truth bore itself out when her breasts started growing. They stretched the hide of her shirt, sliding free, leaving what were her cups to their sides as she became top-heavy. She winced and leaned forward against her will to remain upright. To her mercy, they stopped with each roughly the size of her head.

Only a brief mercy. When their expansion ended, her big, puffy pink nipples gushed with two brand new urine streams splashing against the stone roadway.

She knew what happened. It was a horror tale told among sorceresses throughout time. When emotions boiled over in the mix of magic, the wielder's frame of mind could corrupt her powers and their expression. No longer free to peruse the entire spectrum of her powers, the sorceress found herself locked into a single skill set - if she could control it. For some women, it was fire. For others, lightning, or illusion.

Triss wasn't so lucky. Or rather, the woman formerly known as Triss. As the changes rose upward to soak her mind, they conjured a new name which she could not deny even while her cheeks burned at having to say it.

"This may not seem like much yet, but wait until you find out what Piss Merrygold can really do."