In a world where Loki didnt get brain washed by the Chitauri and wasnt responsible for all that crap and is just Thors bratty little brother who is sulky and jealous because Thor gets to go hang out on earth and Odin doesnt trust Loki enough to let him go to Midgard, and while Loki knows of his frost giant heritage, he chooses to ignore it out of embarrassment and prefers his glamour and no one gives him shit it about it or cares or talks about it because this is a perfect world—-
Its Halloween at the Avengers Tower and Tony has been reading up on Norse Mythology and history ever since Thors golden ass dropped from the heaven and literally changed everything Tony thought he knew about gods and magic.
And he keeps coming across this place “jotunheim” and these “frost giants” in his reading, and learns that these blue skinned creatures are the scary stories they tell little asgardian children, that their cruelty is legendary, that Thor has slain scores of them and is celebrated as a hero for it.
So Tony, being a snarky little shit who had pre-gamed most of a bottle of wine before deciding on his halloween costume– decides to go as a Frost Giant just to fuck with Big and Golden and see if he can get lightning to flash in Thors eyes like it did the time Clint cut off a chunk of his hair.
So Tony being Tony, goes all out. Dyes his skin blue. Gets extensions in his hair so it flows down his back. Red contacts. Hires a make up artist to draw intricate raised designs into his skin as close to the ones hes seen in the books as he can get.
A fur cape, several thin chains around his neck, sharpened canine caps over his teeth, a pair of low rise linen pants complete the look, and when Tony smiles into the mirror, he doesnt recognize himself at all.
The Halloween party is a smashing success, just like they always are. Steve and Bucky come as Storm Troopers, which is HYSTERICAL. Sam and Clint are Tweedle-dee and Tweedle-dum(ass). Natasha is little Red Riding Hood, and while Tony is pretty sure the fairy tale didnt involve Red making out with a very Pepper-esqu Wonder Woman– no on in the room in complaining.
Everyone is impressed with Tonys costume.
When Thor walks through the door, dressed as a lion, his reaction is to hiss at Tony which of course, makes him the Cowardly Lion for the rest of the night.
But Thor brought a guest, a tall man dressed all in black with piercing green eyes, and when he steps off the elevator and spies Tony, Thor actually steps in between them, a hand up in warning.
“Brother.” he says quietly. “I did not know Anthony would be dressing as a Frost Giant, and he is not aware of your heritage. Do not take it as an insult, or that he is mocking you.”
“I dont.” is all Loki says, and in a glimmer he is gone from Thors side, reappearing all too close to Tonys face, staring hard into the red contacts and at the blue designs.
“Hey good looking.” Tony is three drinks past tipsy, and doesnt know where the gorgeous man came from or why he is staring so intently at him, but hey– Tony looks good in blue paint and he knows it.
“This is the first time I have seen this form and thought it beautiful.” the man says then, his voice a low timbre that Tony feels down to his toes.
“Oh?” Tony is confused but intrigued. “Lots of Frost Giants where you’re from?”
Loki watches him for another moment and then the air blurs around him and Tony blinks in surprise as the man in the dark suit shimmers into a man with deep blue skin and shocking red eyes, black hair down to bare shoulders, designs etching over his forehead and down his neck, across his naked chest and disappearing beneath the loose pants that replaced his fitted suit.
“Look at what I just realized Im attracted to.” Tony blurts, then instantly wishes he had at least attempted to be charming, but it seems like its alright, because the man smiles, pointed teeth gleaming in the light.
“I can appreciate the sentiment.” Loki says, letting his eyes trace every bit of bare skin he can see. “Anthony Stark, is it? My brother has told me much of you.”
“Your brother.” Tony repeats. “Thor? Oh shit. Thor is your– that makes you—” then he cocks his head. “A Frost Giant in line for the throne to Asgard. Interesting.”
“Its a long story.” Loki grins.
“Well.” Tony leans back against the table, returning Lokis appreciative glance with something halfway to a leer. “I think I have lots of time.”
In the morning, the blue paint has mostly worn off of Tony, staining his bed sheets, the shower, theres a patch on the wall that looks remarkably like his ass and that makes him laugh as he opens his eyes to the sunlight.
“Good morning.” Loki says cautiously, green eyes watching Tony carefully.
“Its the weirdest thing.” Tony stretches, knowing the sheet falls below his waist and smiling as Lokis gaze drops lower. “To fall into bed with a Frost Giant and wake up with an Asgardian.”
Loki swallows hard, the air blurs and when it clears again he is in full Jotunn form, right down to the pointed ears that Tony tugs at playfully.
“Damn.And I used to think Thor was the sexy brother.” he teases and Loki bends to kiss him good morning.
Tony never really knows how much it means to Loki that Tony loves his Jotunn form. The freedom to be blue and red, to call his frost and pull snow from the air, to dig his sharpened teeth into his lovers neck, to move between genders and have Tony be turned on by every one one of them, to shift and glamour and use his tricks and have Tony be delighted instead of weirded out– it is something that Loki never thought he would have, and treasures every moment of it.
In fact it isnt until much later, when Tony asks Thor if he should get Loki a ring with diamonds or if that would be weird, that Thor tells Tony of how Loki struggled with his heritage, of the nights he cried over it, and how the night of that Halloween party, Thor had been so sure Loki would flee in embarrassment.
“If anyone should flee it should be you.” Tony says mildly. “Your golden ass cant compete with how gorgeous Loki is, god of Fertility or not.”
Thor only smiles, and from around the corner Loki is eavesdropping and smiles as well.
He never thought his Jotunn form was beautiful.
