A/N: This story is a Marvel/Supernatural crossover and a collaboration between me and my wondertwin @kittenofdoomage She’s been a saint because I know I have driving her NUTS with this story but I am just obsessed. It’s happened to all of us.
Two Years Earlier
This was supposed to be a milk run. On the way back from another case, Sam had caught wind of a few deaths that sounded demonic so they had stopped to check it out. He and Dean had both taken some hard hits during their last case. Sam had cut his hand pretty badly, and Dean had messed up his shoulder. They really weren’t in fighting shape, though they would never admit it.
Two demons had Sam’s arms pinned behind his back, and one of then had jammed Ruby’s blade against his neck. Another demon had Dean jacked up against the wall, slowly cutting off his air supply as he struggled and flailed in an effort to get free.
“Let them go.” a soft voice said. Everyone turned to see who had spoken. A young woman stood there, alone and weaponless.
“Get out of here!” Sam yelled. “They’re demons!”
The woman rolled her eyes at him. “I KNOW that Stretch, thanks for the newsflash.”
The demon holding Dean dropped him suddenly, and he fell to the floor with a hard “Uumph.”
“You must have a death wish, little one,” he said as he began to advance towards her.
A grin tugged at her lips. “I really wouldn’t do that if I were you.”
The demons closed in on the girl, as Sam struggled to break free of his captors. Dean was already on his feet. The demons had almost reached her, when a strong wind began to kick up in the room, whipping the girl’s hair around her head like angry snakes.
“I’d get down if I were you two,” she yelled to Sam and Dean over the sound of the wind. Her eyes began to glow with a bluish light and she held her hands out in front of her. It was as if she pulled lightning out of the ceiling, throwing it at the demons and instantly frying them.
Sam and Dean dropped to their knees, covering their heads as the smell of burning flesh and the sizzle of ozone filled the air. When they looked up, all the demons were dead; the girl put her hands down and her eyes gradually returned to normal.
“Are you okay?” she asked, running over to them.
Dean flinched away from her. “Are you a witch?”
“What? No! I’m not a witch!” she replied quickly, frowning. “I’m a hunter.”
Sam smiled gently at her. “I’m Sam, this is my brother Dean. We’re hunters too. What’s your name and how do you do that?”
“I’m Y/N. I’ve always been able to do this, so I can’t really answer that, sorry. Do you guys want to discuss this somewhere else? Somewhere less demon-y?”
You crossed paths a few more times with the Winchesters, saving their asses again when a pair of ghouls were eating their way through a town in Mississippi, and later helping them save a tiny hamlet in Texas that was being held hostage by a pack of bloodthirsty vampires.
After Texas, Sam and Dean invited you to come back to their bunker to hang out. “You have a bunker?” You said with surprise. “Are you guys survivalists or something?”
Dean rolled his eyes. “It’s not THAT kind of bunker, Y/N. It’s not buried underground!”
Sam explained the whole Men of Letters deal and how they had commandeered the bunker.
“It’s our Batcave,” Dean said with a smirk.
“We work well together, Y/N. We make a good team.” Sam commented, staring at you long enough to make you flush a little.
“This I gotta see. I’m in.”
Despite promising yourself you wouldn’t stick with them for long, things with the Winchesters were more lively than you’d imagined. The bunker they’d told you about was a treasure trove of information and relics and it was less than a day before you were bonding with Sam over a love of books and history.
Friendship turned into something else and eventually, weeks dissolved into months. You admitted to yourself that you’d fallen in love with Sam and it was unlikely you’d be going anywhere soon. He was passionate and kind and brave and endlessly curious about your powers, which was kind of adorable.
“Can anyone else in your family do what you do?” he asked you one day when you were reading in the library.
You looked up and shrugged. “I don’t know. I grew up in foster care. I know nothing about my birth parents.”
“Well, I think your zappy-thing is awesome!” Dean said enthusiastically, shoveling a candy into his mouth as he walked into the room.
Sam snorted, leaning back in his chair. “Sure you do. Weren’t you the one who thought she was a witch when we first met?”
“Shut up!” Dean scowled, folding his arms over his chest. “She’s proved she is definitely an asset. She can kick YOUR ass, Gigantor.”
“She can kick yours too, Dean. And I’m her boyfriend, so I think my ass is safe.” Sam snapped back.
“Guys….” You tried to intervene, but they were on a roll.
Dean rolled his eyes towards the ceiling. “Just because she is sleeping with you….”
“GUYS….” You said louder. They ignored you as they tried to talk over each other.
Your eyes had begun to glow as papers began to blow around the room. Then Castiel teleported into the bunker, and you were so happy to see the angel you instantly calmed down. “Turn on the television,” he growled. “Now.”
“Cas, what’s wrong?”
“Aliens have invaded New York City.”
You, the Winchesters, and Castiel sat in front of the TV in disbelief watching the coverage of the “Battle of New York” and its aftermath. Buildings destroyed, thousands of lives endangered, hundreds dead… it was horrific.
Dean seemed more intent on focusing on one aspect of the reports. “Seriously? Aliens are real? With all the shit that we have dealt with, why haven’t we ever come across one?” He looked at Sam, who shrugged and held his hands up.
“There was that one time,” he offered, “but it turned out to be fairies.”
“I have never seen a creature like the Hulk before. He seems very angry,” Cas observed, frowning at the screen.
“What about Tony Stark? Now there’s a genius! He actually built that suit.” You could tell by the tone of his voice that Sam was impressed. “I mean, we’ve all heard about it but we never thought it was an actual thing.”
“Did you see Captain America? What a soldier! I used to love his comic books when I was a kid.” Dean had a far-away look in his eye as he watched the reports and you recognized it as hero-worship. He was suddenly 9 years old again, a goofy little kid and it just made you wanna pinch his cheeks.
On the screen, New York was in pieces. You’d never been to the Big Apple and now… aliens? It seemed unbelievable, despite your own abilities. And superheroes with powers you’d never seen.
“People are never going to leave them alone now. The entire world knows what they can do,” you whispered. You always did your best to only use your powers in public when absolutely necessary, and you tried to never let anyone capture you on film doing it - it was a can of worms you never wanted opened.
“You could be an Avenger, Y/N. You are very powerful,” Cas murmured gravely, not taking his eyes off of the television screen.
You laughed, waving him off like he’d told the funniest joke ever. “I am happy hunting monsters with you guys,” you informed him, leaning back and picking up your soda. “Let’s leave the aliens for the superheroes, okay?”
