Y/N POV
I wake up, still shaking from the nightmare.
'No, I must forget it again. Remembering it will just hurt me more.'
I quickly change into the weird uniform that Bruce and Tony created for me.
It has the signature Avengers "A" on it. The suit itself is Dark Blue.
I leave my room and head for the elevator.
After taking the elevator to the highest floor, I meet up with the rest of the crew.
"Alright, everyone is here. Friday you can start" Tony says and walks into, what appears to be, a big fighter jet.
Everyone follows him, I step inside the jet and the door shuts behind me.
Everyone sits down,my seat is next to Thor and Nat.
The jet flies off and I can feel the cabin pressure stabilise.
"You okay?" Nat asks, clearly worried about my serious face.
"Yes, just not feeling that well." I try to smile but the jet suddenly stops.
"We're here" Tony says as we land.
Everyone leaves the jet.
As soon as I step out of the jet, I notice how cold it is.
We are, in what appears to be, a forest. Lots of spruce trees surround us. Snow crunching below our feet.
There's a cabin next to the jet. I can feel some sort of energy coming out of it.
I start heading towards it.
"Y/N?" Nat notices me "Where are you going?" She slowly walks behind me.
"Just the..." I try to say something, but my words fail me. I open the door of the cabin and a bunch of blue dust flies out. I quickly close the door.
"That must be one of the many burial sites" Hawkeye says, crossing his hands "Lets not let out the dead just yet"
He laughs and Tony sighs.
"We have located the Tesseract, it should be right under me" Tony says and looks at me.
"It's your turn"
'Right, my turn. I just have to use the teleportation device. Quickly in, take the thing and then quickly out'
"Yes, my turn" I go to where Tony is standing and turn the device clockwise.
After a few blue flashes I end up in a weird room filled with concrete, there's a glass table in the middle of it. On top, sits the Tesseract, pulsating.
I quickly grab it and turn the device counter clockwise.
I teleport back, surrounded with the Avengers. Suddenly I feel a sharp pain in my head and everything goes dark.
TONY POV
Y/N returns 28 seconds after teleporting away, she looks at all of us and smiles. But the smile is quickly turning into a frown. Without a word she falls down on the snow.
"Y/N!" Natasha says as she tries to wake Y/N up.
As Natasha about to pick her up, a blue light zaps her.
"What the hell?" She shouts "This wasn't supposed to happen! You told me she'd be alright"
She walks up to me, trying to punch my face.
"Natasha, she'll be okay. It's just that her body couldn't handle teleportation."
Natasha sighs and picks Y/N up, this time not getting zapped.
We quickly enter the jet and fly off.
After a few hours we land at the Avengers tower.
Bruce and Nat quickly rush Y/N to the infirmary.
Y/N POV
I wake up to Nat staring right into my soul.
"Is there something wrong?" I open my eyes to see that I'm already back.
"Everything is alright, you just couldn't handle the teleportation that well" Nat says, trying to assure me.
"I see" I sigh and notice the Tesseract sitting on a different table "at least I got this back"
"You did an incredible job." Bruce says, turning off the machines around him "You're alright, but try to go to sleep early tonight"
"Thank you!" I leave the bed and head to my room.
I walk past Loki's door and quickly enter my room.
After taking a long shower I decide to watch some TV.
Suddenly, I feel a sharp pain in my stomach and the need to puke.
I run to the toilet and throw up, except my vomit is a blue glowing substance.
I continue to throw up.
It lasts a few minutes. I leave the bathroom, barely holding onto the walls.
"Loki... he's the closest one" I stumble my way towards his door.
I knock faintly on the door, no answer.
"Loki, Loki please I need you. I need your help!" I try to say it as loud as I can, nothing.
I lay down next to the door, shivering from all of the pain.
Suddenly the door opens and I feel two strong hands picking me up.
To be continued

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Between Two Worlds || Loki x Reader
FanfictionY/N is an assassin trained by her parents. One day she has a mission to assassinate an avenger. Instead she finds out a shocking fact.