Harley Quinn

Harley Quinn had gone shopping.

Of course, for a lunatic criminal like her, shopping meant breaking in to a top-secret STAR Labs facility, killing anyone that got in her way, and then taking whatever looked the most fun before getting the hell out of dodge.

So, not too dissimilar to what a normal person would call shopping.

"Gonna need some of this... some of this... not that one... ooh, this looks fun!" Harley sang to herself as she raided a chemical storage unit, either storing away phials of brightly coloured liquids covered in warning labels, or carelessly tossing aside the ones she decided weren't worth the time or effort. The room the storage facility was in was littered with broken glass and pools of noxious chemicals, along with the several cowering scientists and the bodies of their deceased co-workers, all victims of Harley's rampage.

"Oh, now this one looks extra fun!" Harley cooed as she pull up a glass philter full of a thick, black goo.

"No please, don't!" One of the scientists cried out in panic. "That's some sort of alien mutagen. Highly unstable and extremely dangerous! You can't let it loose in the world!" She explained, but her warnings only drew mad smile from the villain.

"'Highly unstable'? 'Extremely dangerous'?" She repeated, her tones far more bright and happy than the dire warnings the scientist let out. "Sounds like a match made in heaven! Come to Mama Harley, goopy!" Harley kissed the vial and deposited in the container slung around her waist. Her work done, Harley's eyes then fell on the remaining scientists.

"Thanks for the tip, lady!" She said with sincere cheer, before drawing her pistol to finish the job.

A few screams of terror and gunshots later and Harley finished her job and stole back into the night, carrying with her her ill-gotten and supremely dangerous gains.

In recent times, Harley Quinn had fallen on hard times. Going from henchwoman, sidekick, or partner to full-time solo villain was harder than it seemed on the surface. Especially when you had no powers, no resources, and very little pull in the criminal underworld.

In a slump, Harley figured she needed her own gimmick to boost her career prospects and really make a name for herself. If The Joker could have his Joker Gas, what was stopping Harley from having her very own Harley Gas?

Starting out with some of the aforementioned Joker Gas, along with some of Poison Ivy's pheromones and Venom, Harley began her mad science project in the abandoned ACE Chemical factory in Gotham, pilfering whatever supplies she could in order to make her masterpiece.

Now, while Harleen Quinzel had a doctorate, she was a psychiatrist, and therefore had very little training in chemistry. And Harley Quinn lacked both that training and knowledge, as well as the restraint and sanity her former life provided, so the work was a little chaotic and haphazardous, to say the least.

"Welcome back to 'Cooking With Harley'!" Harley Quinn announced to the live studio TV audience that didn't exist. "Today, we're finishing up our super special Harley Gas with some loving contributions by the eggheads at STAR Labs!"

Harley opened up her case and began to pour out her stolen chemicals into the vat, the liquid glowing a searing neon green and emanating a fine mist of noxious fumes.

"And for the piece de resistance...." Harley withdrew the vial of black mutagen, swirling around the thick glop before popping the cap. "A little dash of our good friend, goopy!" Harley gently tilted the canister over the vat, letting a single, viscous drop fall into the concoction. The black slime was subsumed by the poisonous potion even as it was further transformed, erupting with a cloud of gas (which Harley narrowly avoided a faceful of) and now glowing so brightly that it illuminated the majority of the dingy empty factory.

Harley was beyond pleased, giggling madly and rubbing her hands together. She was certain this was her ticket to the bigtime. Now the only question was who or where would she strike at first?