Blossom has elemental breath, Bubbles has sound wave powers, what about Buttercup?

(second chapter! yay! I know this is a little fast, but I was just too excited about this story)

Bubbles stood there in the bathroom doorframe, watching Buttercup lean against the sink, looking down at the tap.

"Buttercup, that's ridiculous, how could you poison Blossom?" Bubbles asked her sister.

"my new tooth is growing in and..." Buttercup paused, pressing her hand against her chin.

"I noticed a weird liquid on the sandwich where I bit it, the same stuffs on my tooth" Buttercup explained, looking at Bubbles as she stood there confused.

"you think that liquid was poison?" Bubbles replied.

Buttercup nodded, a single tear appearing in her left eye.

"but then why isn't it affecting you like it affected Blossom?" Bubbles questioned.

"well, its coming from me, so I'm probably immune, minus taste" Buttercup replied, sitting down on the stool she was standing on.

"fair point" Bubbles muttered under her breath.

"but this is good news, sure you accidentally let Blossom get affected by it but you've finally got a new power! after 2 years!" Bubbles announced to Buttercup, sitting next to her on the ground.

"can you just..." Buttercup paused, looking away from Bubbles.

"can you just not tell anyone, at least not yet?" Buttercup asked her, looking straight at her.

Bubbles nodded.

"of course"