Return To Harley's Hideout

"Here we are boss! Home, sweet home!" Harley declared cheerful as she and Supergirl entered the abandoned Ace Chemical factory where Harely had been calling her own base recently.

"I don't care about this dingy hole of yours, clown." Supergirl snarled, shoving her brainwashed henchwoman aside as she strode forward to the only thing that mattered to her right now. "This is what I care about!"

The vat of glorious green liquid dominated the derelict warehouse space, incredibly radiant and luminous as to cast a sickly green glow across the entire building. Supergirl grinned maniacally as she stared into the bubbling, noxious mess, licking her lips as she was so close.

"What even is it?" She asked, almost absentmindedly, as Harley bounded from behind, wrapping her arms around Supergirl's waist. "How did you make it?" If there was one thing Supergirl could tolerate about her bubbly ****, it was she was a pretty face.

"I just threw a buncha junk in a pot and mixed it all together, Miss K!" Harley admitted, earning a roll of Supergirl's eyes. "Venom and some of Ivy's pheromones and a bunch of stuff I stole from STAR Labs and - oh yeah!" Harley bounded off and returned with a canister of some sort of black sludge. "This stuff is the secret ingredient!"

Supergirl took the canister and examed it. "And this is...?"

"Some sorta space slime. The science lady said it was an unstable mutagen or somethin'."

Supergirl nodded along. This would explain a few things, her hypnotic kiss and Harley's palm orifices for one. "This seems full. How much did you use?"

"Only one tiny drop, Miss K!" A wicked smile crossed Supergirl's lips.

She quickly opened the canister and dumped the entirety of it into the vat. If one drop could do this, imagine what bathing in this sludge could do to her! The reaction was almost instantaneous, too, black overtaking green as the emerald glare was swallowed by darkness, the chemical stew turning into a black, oily mess.

Supergirl took a deep breath. This would be it. No going back.

She took to the air and floated over the toxic liquid before descending into it, slowly submerging into the black. She sizzled as she made contact with it, her outfit dissolving and her skin hissing, but she felt no pain. She felt so little of anything now. Kara Danvers, Kara Zor-El, Supergirl... she was a hero. A paragon. A beacon of hope for humanity. But all of that had been polluted and poisoned, compassion and goodness choked out and replaced by rage, lust, greed, and desire. She had tried to fight against it, but lost. And lost bad. So why bother trying again? Just sink into the poison and let it consume you...

From head to toe, Supergirl was submerges, thick, gloppy air bubbles rising to the surface of the black goo, while Harley watched on with eager excitement, hopping from foot to foot and laughing and giggling like the madwoman she was. She just couldn't wait to see what her new boss would become.

Then, after several minutes, the air bubbles dying down and even Harley's excitement slowly turning to concern, the surface of the liquid broke, Supergirl rising from her dark baptism a changed woman - mind, body, and soul.

Her suit burned off, she was stark naked, her skin now a ghostly pale pallor, the muscles along her arms, shoulders, abs, and thighs more defined and large. Her breasts, ass, and hips had swollen in size too, her figure now on par with such beauties as Wonder Woman, Zatanna, and Powergirl. Her nails and lips were now permanently painted black, the former also long and razor sharp, while her hair had radically changed. The long flow locks turned into a jagged, punkish bob, while the bright blonde had given away to a poisonous green. And, finally, a long scorpion's tail descended from her back, ending in a wicked barbed stinger.

Supergirl's eyes opened, filled with burning hatred, as she hovered above the mutagenic slime, basking in her evil rebirth.

Harley let out a sharp, wolfish whistle as she devoured her mistress' body with her eyes. "Wow, Miss K, you're fucking hot!"

"My name, you brainless bint, is Kontagion!" The newly named villainess declared, her voice reverberating with cruelty and malice. "And we're going to bathe this entire world in my poison, remaking it in my blighted, toxic image!"