The Black Serpent (Pjo/Avengers Crossover)

Chapter 1

(A/N) Hi people!!! This is my first story ever so I really hope you enjoy it.

*This story has been edited slightly from the original version so it works better with the ending. (Don't worry, now it's even better than before!!)
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Italics - thoughts and occasionally used for emphasis.
Bold Italics - Greek
Bold - Authors note
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Disclaimer for entire story: I DID NOT WRITE ANY OF THE PERCY JACKSON BOOKS OR THE MARVEL MOVIES/COMICS!!! I AM A HUMBLE TEENAGE GIRL NOT ANY OF THOSE AWESOME PEOPLE! I OWN NOTHING!!!!!!!!!!!!!!
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Natasha's POV:
I growled in frustration as yet again my target was dead on arrival, a black snake spray-painted on the wall over the body. The crime scene was immaculate as always; The Black Serpent was impossible to track. S/he was the best of the best. Nobody knew what s/he looked like nor who s/he worked for (if anyone). I vacated the premises and made my way back to headquarters. This was getting embarrassing. No matter what I did, The Black Serpent has been beating me to every job in the last 6 months. They are considered the best and deadliest assassin in the business, yet no one, not even Shield knew who they are. S/he seemed to vanish into thin air whenever anyone got remotely close.

No ones POV:

Arriving at the Avengers tower which had become headquarters for shield, she made her way to Fury's office where she would debrief. Upon arrival Natasha's generally guarded facial expression cracked for a split second, revealing her apprehension and despair.
"Fury The Black Serpent beat me again. I don't know what to do anymore!"
"Agent Romanov take a few days off, relax, sleep, get you thoughts together and when you get back, there will be a mission waiting for you. "
She looked like she was about to protest but Fury cut her off,
"no buts. If you don't do what I say I'll have you doing paperwork for the rest of the year. Now go. Have fun Romanov"

Tony's POV:

I rubbed my eyes and looked critically at my suit, still imperfect. I need to keep working, keep improving it. How else would I protect my friends from danger? Granted Ultron ended in disaster, but that was just a setback. So I won't build a suit of armor around the world. I will make my suit perfect so I can protect the people in my life I care about. Pepper, the team. I needed to save them. The voices were getting worse. Every time I closed my eyes other worldly voices crept into my my mind, showing fear, death and disaster. They brought forth my worst memories and my greatest fears. I didn't sleep. I stayed up days on end, only falling asleep when forced to and for short amounts of time, my drinking was getting worse and I couldn't stop. It was killing me but I don't know what to do, or who to ask for help. I'm alone in my mind even when I'm surrounded by loved ones. They can't help me they are in danger. Danger, danger, danger, d a n g e r. I think I'm going insane.
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Pepper burst into the lab but I barely noticed her. My vision was tunneling and I could only see the suit. The suit was important. Very, very, very, important. What was I saying. Pepper! Pepper is here. I turn.
"Why are you here? I'm working"
"Tony?" Her voice showed concern but I was having trouble processing things. The voices are getting worse. It's too loud. I want it to stop. Why won't it stop. The never ending whispers. The sounds of guns firing and bombs exploding. The nothingness of space. Never ending, never stopping. No! help. I must finish the suit. Make it perfect. Perfect, perfect, perfect. Must fix it. Or they will come. They will take the people I care about away. Away, away, away.I will be alone. All alone. Alone. Alone. Nononononononono.
"Tony can you hear me? When did you last sleep honey? Or eat?"
"Too busy to eat or sleep this is important."
"Tony come with me baby, you need help. If you keep continuing like this you'll die. Come with me Tony, please."
I turned back to my work feverishly not bothering to answer. The voices told me that everyone will die. Everyone will die. They will die. I will be alone. All alone. Nonononono! They said I would fail. But I will fix it. I will fix my suit and protect everyone. No time for food or sleep. No time. I felt a stab of pain at the base of my neck and suddenly my muscles clenched, I fell to the ground and blackness overtook me. The last thing I saw before I lost consciousness was Peppers guilty face. No don't make me sleep they will- I never got a chance to finish the thought as blackness consumed me.

No ones POV:

"JARVIS please gather the avengers in here, I need to speak to them. Also get me a pillow and blanket for Tony." Pepper said tiredly; worrying about Tony had taken its toll on her.
"Yes ma'am. The avengers have been notified and a pillow and blanket are on their way for Master Tony.

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The Avengers and Pepper huddled around the slumbering inventor, tension filling the room.
" What happened Pepper? How did he even get this bad?" Steve questioned
"I don't know Steve. He was scaring me so I gave him a sedative but according to Jarvis the last time he ate was 3 days ago. Tony hasn't slept in almost a week and he has been living on energy drinks, coffee, and alcohol. This lifestyle is killing him and I don't know how to help. We need to get him to the medical ward asap. Bruce do you think you could preform a psychological and physical evaluation?"
"Sure Pepper." The quiet scientist said shyly. Steve and Thor picked up Tony and as a group they made their way to the medical bay 4 floors down.
After settling him down onto a white medical bed the team minus Tony and Bruce went up to the common area on floor 97.
"Guys, I'm gonna need your help with Tony. I can't do this alone, especially with Stark industries to run."
"Well I'll be here Pepper, Fury forced me to take a few personal days and I would be fine checking up on Tony and keeping him company." Natasha volunteered. "I can't believe I just offered to spend time with Tony. Ugh maybe Fury is right, The Black Serpent has driven me insane!"
"Who?" Steve questioned with a raised eyebrow.
"The Black Serpent? Only the best and most allusive assassin in the business. No one knows who it is, who they work for, heck we don't even know of its a man or a woman. She pulled out her untraceable phone Stark made for her before ... anyway, she pulled up a picture of the Black Serpent that was always spray painted on the wall next to his or her victims. It was a simple snake sitting on an anchor.
" This is The Black Serpents trademark, and the reason for his/her name. Besides this we know nothing. The best detectives in the world (Sherlock Holmes perhaps?!?!) got nowhere when trying to figure it out. S/He is the shadows themselves, the mist in the air, the eye of the storm. Untraceable, unknown. They don't exist and yet there they are." She took a deep breath her emerald eyes flashing, "If I don't end up getting killed by him or her, then The Black Serpent is my hero, sick as that sounds."
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I plan to update every Sunday starting next week, please read! This is my first story so I would appreciate comments on how to improve it. No hate! See ya later you awesome people R&R.
-E.R.Ruff