I don't own Mortal Instruments or Darkstalkers, so please... enjoy. This is my first upload. Also, this was supposed to be a crossover fict, but the category of Night Warriors: Darkstalkers wasn't around.

They had seen what happened, both Augustine and Steve marveled at the execution of such macabre form of murder. The still beating heart of this Shadowhunter, lying in a pool of his own blood was sprawled in the dark alley on the side of the hunter's moon. The killer did a good job in-framing the death, but sadly, they'd seen the murder, although they had been too late. Steve didn't exactly know that the next murder would be here, he just came to warn Lucian Graymark—Luke Garroway, of the murderer that has been framing the Night Children, once again.

He knew this is an insignia to trigger a war between Shadowhunters and Downworlders, one similar to this pattern has been used earlier just this year by none other than the late Valentine Morgenstern. The nape-long silvery blonde hair of Steve glowed defiantly at the Alley's dark and eerie atmosphere of the alley, he was somehow like Jace who looked like those stone statues of Angels one might see in-Cathedrals, except that Steven Knightgallows' personality isn't quite in-sync with his looks.

Augustine Conharme, glared at the shadowy figure that tried to escape earlier. The figure didn't have time to escape because Augustine immediately bellowed at her to stop. His baby-blue eyes glared at the dark figure.

"Alright, come on, show yourself." Augustine said plainly.

The figure emerged into the poor lighting of the alley. For her age-which is about thirty according to Steve's head calculations—she looked very beautiful. Her soft curly brown hair framed her round face. Her eyes were as green as the leaves of a poison ivy. Her slim and wonderfully curved body was covered by a dark leather coat reaching up to her toes, her pants were an odd color of purple.

"There's nowhere to run, bitch. So if I were you, I'd start praying to Satan, cause you're about to experience a rough ride back on the highway to hell." Augustine yelled through his pants, Steve couldn't blame him; the lady was extremely fast on her heels.

The lady laughed, her laughter sounded soft and melodic, "Oh, wouldn't you like to spend some time with me? You did capture me after all. See? I'm like a cornered cat… a very naughty cornered cat." She said, twirling her curly dark-brown hair. Her voice was inviting, and it dripped like honey bathed in poison.

Her green eyes were the most impenetrable defense mechanism she has to offer, she was hard to read to the point Augustine can't analyze her. Augustine Conharme is usually good in-analyzing a mundane, shadowhunter or downworlder's personality via eye-contact, but this time, he's having a very hard time distinguishing what's wrong with this sexy demon.

"Augustine." Steve said, "Keep your guard up. She's killed a Shadowhunter, an adult. And it's not hard to believe that she can nibble on the flesh of your stomach in just two seconds."

"That is a harsh accusation coming from a boy like you." The lady said with her soft and inviting voice.

"Well, the evidence is lying half-dead on the ground isn't he?"

She laughed, a soft laughter that would make any Shadowhunter forget that she's a Demon. "Why... tragic isn't it? He only has two minutes until his heart stops beating. But I won't do that to any of you boys... I'll nurture you... care for you... lick that thick honey from your dicks that you call semen."

Augustine's mouth gaped open, feeling the intense urge to drool, but Steve glared at him with his dark green eyes, which caused Augustine to snap back to his composure. "Now, Augustine... ready. Keep your head up, I can sense her power... she's no ordinary demon."

"Don't be so sure young Nephilim, I am not what I seem." She said, elongating her long talons of claws.

"Yeah? That's what they all say, lady."

"Can't we just have a little fun? It doesn't have to be this way. I have the natural powers of arousing both of you."

"Yes, please." Augustine said, after his long silence.

"Gus, no. She's tricking you, can't you see that?" Steve said, for the first time he traced impatience in his own voice.

"I told you never to call me that in-public, you sick excuse of a human being." Augustine replied.

"Ah, for the love of-Augustine, I was trying to wake you up."

Her leather coat exploded into a flock of bats that circled around her, hissing like the storm. It made Steve and Augustine take cover behind the trash bins. The bats compressed on her, maintaining the circular formation, until the noisy creatures were transformed into her dark, purplish wings.

The woman with the dark, curly hair disappeared and was replaced with a much more beautiful lady with straight green hair that spilled from her head. Her outfit was replaced by a tube; the hem of her gothic dress was covered in white puffy fur. Not much was replaced from body, except for the black as the moonlit night leathery wings that was wrapped around her hips. The veins of her wings stuck out in contrast to the spiny dried bones in the middle and on the side, ending in a pointed horn.

She smiled a soft smile. "Come on Nephilim, you wanted to resist, then your resistance will be rewarded by an unimaginable and painful death."

Steve didn't say anything, just stared at her with his intense green eyes, trying to decipher the Succubus' next move.

Augustine can only stare at her chest in-awe, Steve tried to wake him from the hypnosis that plunged him deep as a knife. "Bro, focus. She's using a trick on you."

"Oh sorry, I'm sorry if I'm a little off today, it's just-" Augustine said in an aggravated sarcastic tone, then quickly snapped back to reality as if he's been woken from a dream.

"I'd love to watch you argue, boys. But it seems as though I have another date with a certain… Daylighter.." She spread her dark-leathery wings, and shot herself into the black and blue shade of the night, tainted with twinkling stars. The sound of her laughter died away as she ascended to the sky.

"Steve, no." Augustine said, as if he can read what Steve is about to do.

"No…"

"Good."

"Sorry."