For Halloween prompt - how about a vampire Starker with SIM!Tony meeting his kinky and power equal in Vampire!Peter?
Warnings for murder, blood, fear kink, and dehumanization
"I like the way you catch your prey," a man behind him said. Peter set down the drink he was pretending to nurse. He turned away from the bar to see the host of the party addressing him.
"I'm sorry?" Peter answered.
Tony grinned. "Men like us don't apologize," he said with a wink. Then he held out his hand. "Come take a walk with me."
Peter stepped down from the stool. He inhaled through his nose the scent he found in the air was strange. There was something wrong with his blood. Everyone here was shooting up Tony's Extremis. They all smelled of it. Tony's was different though. Whatever he was giving the public wasn't the same as what he gave the others. His scent was even more alien.
Tony took his hand and tucked Peter's arm in his. They walked along the edge of the roof, waist high glass railing to one side. All around them the party was turning into a orgy, as they always did. Peter was usually gone by now.
"I don't recall inviting you," Tony said casually.
"I can't imagine you invited all of these people individually."
"You have no idea what I spend my time on."
Peter laughed. "The great Tony Stark? Surely you have more important things to do."
Tony looked at him with eyebrows raised and a gleam in his eyes. "You would be right. In fact, the very important thing I've been spending my time on," he said as they passed through the open doorway and into the bedroom. "Is you."
He stopped and turned so they were facing each other. Peter glanced at the handful of couples in the room. All were too intoxicated to remember this tomorrow.
"What about me?"
Tony's grip tightened on his hand. Something moved up his arm like liquid metal. Peter looked down to see flowing silver moving up his arm. He jerked back as it reached his elbow, but it was strong.
"Let go of me!" Peter shoved him back with his other hand, but Tony grabbed his forearm. The man smiled, entirely delighted to see his genius once again fulfill him. Silver slid up that arm, too, encasing him up to his neck until he couldn't move his arms.
"I know why you come to these parties, Peter. My friends can be careless. Sometimes accidents happen. Sometimes a person slips and falls from a rooftop."
"I don't know what you're talking about. Let me go!"
Tony leaned into his space. "I don't mind you killing people. Not even people who are close to me." He scoffed. "If they couldn't fight you off, then they deserve it. No matter how much Extremis they take, they'll always be weak. Not like us."
"What do you want?"
Tony's eyes slid down from his own. They lingered over his lips, then carried on down his body. Peter breathed a little faster, air moving uselessly through his lifeless body in a mockery of human arousal.
The silver on his skin drew back, growing less rigid. It felt soft now like skin as it brushed over his skin. A human hand wrapped around the back of his neck and pulled him a step closer. Then Tony's lips were on his, moving together, as silver tendrils slid over his body making him shiver down into his toes.
He followed eagerly as Tony pulled him onto the bed. The man laid down on his back, cradling Peter to him. Hands on his hips, encouraged him to grind against him. The growing pleasure only reminded him of how hungry he was. Orgasms are sweeter without the distraction of aching fangs and Tony was practically demanding sex. Not that Peter had any complaints about that.
He pushed up on his hands, looking down at those blue eyes that seemed almost to glow. Tony smirked and he spoke before Peter could even get the words out.
"Let's get you what you came here for." He gently pushed Peter over to the side so he was laying next to him. Then he took a moment to view the hedonism creating something of a chorus within the room.
Tony looked at the woman laying closest to the bed. She was barely conscious and she did nothing but laugh when Tony grabbed her by the hair and pulled her onto the bed. She knelt, body limp, in his grasp.
"He's going to kill you," Tony said, nodding toward Peter.
"Wh-what?" she gasped, still giggling.
Tony shook her. "He's going to fucking kill you." He threw her down in between them. Peter watched her face as terror broke through her high.
"No- no, please-" She tried to push herself up, but Peter put his hand on her abdomen. It took nothing at all to keep her still even as she began to cry.
"Go on then," Tony said. "She's not worth the air she's wasting."
Peter looked at Tony, ignoring the struggling woman beneath him. He'd assumed Tony was just too big of an asshole to care about people dying, but that wasn't it at all. He cared very much. This whole thing he did. Playing god. It turned him on. And he wanted to watch Peter kill in a way he couldn't. With unrestrained violence.
He grabbed the woman by her throat and pulled her back up to her knees. He held Tony's eye as he settled behind her, ignoring the scratching of her nails. Tony moved only to grab her legs to stop her kicking, eyes still locked with Peter's, waiting.
He ran his lips over her neck and she sobbed, crying and begging already. Then his teeth, his fangs, cut into her skin and she screamed. Blood rushed into his mouth and his eyes finally shut in ecstasy. That first taste was always pure pleasure. He moaned into her skin, holding her tighter, feeling a bone somewhere crack.
It must have been a rib and it must have gone into her lung because she was wheezing now, gasping for air, as she suffocated. She died too quickly, forcing Peter to stop and drop her body not yet drained to the bed.
There was a moment of silence as the pair of them stared at each other. Then Tony was on top of him, pulling at his clothes. Between Peter's claw-like nails and Tony's silver tendrils, they turned their clothes into shreds.
The scent of blood was growing in the air as it leaked from the corpse's torn throat. It only made him hungrier. The Extremis now in his system was dangerous. It made him stronger than he already was, but Tony didn't seem to mind the bruising grip on his skin. He only stopped him when a thought crossed his mind and he drew back with a cruel grin.
Beside them, a man was passed out on the floor. His lover had crawled off to find someone else. Tony slapped him until his eyes blinked open, then he dragged him onto the bed. He positioned Peter over top of him, pressing kisses down his spine. He dragged his nails up Peter's thigh bringing a sigh to his lips.
Then he was stuffing his cock into him, without any real care, but Peter didn't mind the pain. Especially not with his weight against his back and his lips on his neck. They shared a kiss as Tony's hips met his ass. Peter moaned as he pushed in deep enough to ache in his gut.
"Take him," Tony purred.
Peter bent his head and placed his lips at the man's neck. For a moment, he moaned and his hands gripped Peter's arms. Then he was whimpering as fangs broke skin. Peter moaned into his neck. The motion of Tony fucking him caused him to tear the man's neck, making the blood flow faster. He wasn't going to last any longer than the man beneath him.
Silver tendrils slid over his skin like living bondage. He hadn't even realized just how much of him needed to be touched until he was wrapped up in him.
"How does it feel when they die on your tongue?" Tony mused.
Peter gasped, mouth unlatching from the man beneath him. He pushed Tony aside, rolling them over so Peter could lay on his back with Tony above him. He pulled him, kissing him with blood still on his tongue, gasping when Tony shoved his cock back in, fucking him while the man beside him took his last breaths.
