Poison Ivy /Toxicdendrons Radicans/: Poison Ivy is closely related to mangoes.
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I struggled feebly as the ropes tightened around me. "You can't escape this time, flower girl." He smirked in victory, "Now, let's see who you really are..." he walked over and reached out, peeling my mask off slightly.

I gulped.

Thinking fast, I kicked him hard, in the shins and chuckled as he howled in pain "Not so mighty now huh, pretty boy?" I teased.

Just the distraction I needed

I felt the ropes loosen and took the opportunity to plunge my hands into my belt and grabbed a handful of seeds. "You'll pay...for...this..." he wheezed, clenching his hands in fists, tightening the ropes even further with his mind.

"Not if I can help it" I grunted. I let go of the seeds I'm holding and it rolled on the ground pathetically, stopping right in front of his shiny brown boots.

He kicked at them, "these pathetic marbles can't save you now," he sneered. "Time to pay for your crimes."

"Leaves of three, please grow free" I chanted under my breath.

The seeds burst into full bloom under the moonlight, wrapping tightly around his body and trapping him completely. A flower grew right in front of his face and proceeds to spew pollen. "Wha-?" The ropes slackened completely as he coughed violently, desperately tearing down the vines. I scurried for the exit door, grabbing my bag of jewels on the table top along the way.

I stood at the door and paused, looking at my watch dramatically, "Oh would you look at the time, I have places to be, people to meet, tata!" I grinned at him triumphantly, running away into the night. I can still hear him bellowing in frustration a few blocks away.

Another point for Deadly Nightshade and zero for Pretty Boy

Jogging towards Sunny Lane, I surveyed the area. Satisfied that no nosy reporters are following me, I leapt over a roof, landing on a secluded balcony, opening the hatch of the door deftly and sneaking in. The door closed with a soft click and I finally relaxed. I peeled my mask off and tucked it into my belt.

"Meow"

"Hey Owl" I absentmindedly bent down to scratch the chin of my ash-grey coloured fuzz ball. Owl purred before leaping away, settling comfortably on the bed, staring at me intently.

Without bothering to change out of my suit, I plopped onto the floor and dug out my flashlight to examine my bag of emeralds. As I was ran my hands through the emeralds, an emerald cut in the shape of a tear drop caught my eye. I plucked it out skilfully from the bag before stashing my catch of the day underneath a loose floorboard.

The emerald glittered brightly in my hands as I twirled it around slowly in my fingers. "This could be the one" I mused, bringing it to my workbench and crushing it delicately with my diamond dusted pestle against the mortar. 

I glanced at the pastel pink flowers of the Nerium Oleander, standing regally in the moonlight. It's known for its medical uses, but it's too deadly to be used and also the only plant I can't wield.....yet. Imagine the power if I can control such a plant. It would be a deadly cure. Dusting my hands of the emerald powder, I carried the mortar containing powder to the plant.

Here goes nothing

Reciting my spell, I dusted the plant in emerald powder,

"Leaves to roots
Flowers to shoots,
I command,
May you bear the fruit,
Healing and destruction of absolute"

I stared at the plant expectantly, holding my breath. The plant glowed a brilliant green, shaking ever so slightly, before returning to its original state.

I blew out a long breath, rubbing my eyes tiredly.

Failed, again

I noted down the details, chewing my pencil thoughtfully, Darn, I'm sure this gem was the one, maybe crushed Ruby?

"Mrow?"

"Yeah, its time for bed don't you think? I have exams tomorrow" I yawned, scratching its head. Owl purred as it jumped off the bed and padded to the corner of the room to groom itself. I lazily switched into my unicorn onesie, hanging my suit on the chair.

"Night, Owl." I climbed into bed, sinking into a dreamless sleep.

Unbeknownst to me, at that moment, pretty boy was plotting for revenge.