Disclaimer: I do not own any content recognisable as belonging to the MCU or Percy Jackson universe. All rights go to the respective owners.

1 - Percy

I paced the gym, absent-mindedly twirling Riptide, in pen form, in my left hand. In my right I grasped the hilt of a blunted short sword. Across the giant training area in the centre of the massive room, Steve Rogers was bent over, clearly pretending to tie his shoelace. I mean, he wasn't, he was just catching his breath, but I didn't want him to know that I knew he was tired. Wait, that doesn't make sense, we were supposed to be going all out on each other, and he wasn't that much out of breath at all.

As soon as he began to stand up, I pushed all thoughts from my mind, and rushed at him, using his outstretched arm to propel myself upwards, where I twisted myself up onto his back. He whirled around, in a solid attempt to shake me. Lucky for him, my hands were sweaty, and I slipped off quickly, before I could get a good hold around his neck.

I ended with a hook to his face. Blood swelled from his nose and he staggered, dropping his shield with a heavy metallic clang. I saw the opportunity. I took it. Moments later, I had him on the ground, knee on his chest, sword at his neck. Steve threw his arms out in defeat. "Alright, get up," he croaked, "I need to… well," he gestured to his crimson covered face and still dripping nose.

"Fine," I said, and stood, trying not to put too much pressure on him.

"Just so you know, I was going easy on you." He looked like he tried to smile, but then grimaced, and went back to raiding the first aid kit for cotton balls.

"Oh, I knew." A devilish smile danced across my face. He looked up again, confused, pinching the bridge of his nose. I handed him a tissue. "I was going easy on you."

Ten minutes later, I found myself full of energy. Again.

I hadn't told anyone at the tower who I really was, so I couldn't push myself to my limits against them. I knew they all took it easy on me, because I was 'the kid'. None of them had a single clue of what I was capable of.

I guess I should probably explain.

My name is Percy Jackson, and I am a demigod. Think back to pretty much everything you know about Greek mythology (not all of it, some stories were actually made up), bring it into the twenty-first century and that's basically my reality. My mom, Sally Jackson, (who is the coolest, by the way), met Poseidon, the god of the sea, (who isn't half bad, either) and, drum roll please, I was born. So yeah, I am half god. It'd be pretty sweet if it wasn't for the monsters. Yes, there are monsters.

I was kicked out of every year of primary school. I am a pro at being the new kid. My sixth grade school, Yancy Academy, was probably my favourite. Until I vaporised my maths-teacher-turned-flying-demon on a field trip. Then on a weekend out in Montauk with my mother (this was all before I knew about the demigod thing), my best friend Grover suddenly turned up, and he wasn't human. Turned out he was a satyr, and this minotaur chased our car all the way to this camp thing Grover and my mom had mentioned. Anyway, long story short, Mom got kidnapped by Hades, and I learnt who my father was at a place called Camp Half-Blood, a safe place for demigods to live and train to fight the monsters that haunted almost every aspect of our lives.

I ended up going on four quests in four summers (did I mention it was a summer camp? Well, it is) and that's a record, I think, unless you count Hercules (His name was actually Heracles, but everyone remembers his Roman name better). I found and returned Zeus' lightning bolt, as well as going into the underworld and returning alive, ventured into The Sea of Monsters (or the Bermuda Triangle), to find the Golden Fleece to save the pine tree which protected the camp's borders, then I followed another group's quest, mainly because the girl I liked, Annabeth, was one of the reasons they went, and well, they were one person short, so I sort of added myself to the group. On my fourth quest (It was technically Annabeth's, though), we attempted to navigate the Labyrinth (100% DO NOT recommend), and discovered Daedalus' workshop. We ended up having a massive fight with a whole bunch of monsters, who were intertwined with a huge, dark plot.

"Luke, one of the other campers who had sort of turned, to the dark side, I guess, in my first year at camp, was a son of Hermes who felt that our godly parents didn't really appreciate us much. He awakened Kronos, the Lord of Time, and tried to destroy Olympus. That was a few months ago. It became known as the Battle of Manhattan, except the mortals had no clue about any of it, because they were asleep the whole time (long story). After we pretty much saved the gods from, well, extinction, they rewarded a whole bunch of us. Annabeth became the 'Official Architect' of Olympus (which, by the way is on the 600th floor of the Empire State Building, weird, I know), Grover became a Lord of the Wild, and I was given a wish. Sounds cliché, but they were literally going to make me a god. I refused. Instead, I asked that they pay more attention to their kids, and at least claim them once they turned 13. Later, we started building cabins back at the camp.

Cabins for the minor gods and goddesses, and Hades, because for some reason there wasn't one. Rachel Elizabeth Dare, a mortal who could see through the Mist (a veil that covers up all the monsters and stuff so most people can't see them), became the new Oracle of Delphi, with the blessing of Apollo, and Annabeth and I finally started dating.

Everything was actually awesome.

Then the sky opened up, and hell descended.

Okay, so it didn't.

It was 2012. A month or so after we fought Kronos, and I was already on yet another quest. It was mine, and I'd taken Annabeth (obviously), and Clarisse La Rue, a daughter of Ares.

Apparently (I learnt all this afterwards), Loki, the Norse god of tricks and mischief, tried to take over Earth with an army of aliens called Chitauri. SHIELD, some intel/secret spy agency launched a thing called the Avengers Initiative, which pretty much consisted of six very powerful/highly skilled heroes, and they fought the aliens and saved New York.

Well, they thought they saved New York. The three of us easily destroyed a whole bunch of the monsters, which had appeared out of a second portal about ten blocks away from the first. It went something like this…

I wasn't 100% sure where we were. I thought I could find my way around New York, but I guess I only knew Manhattan. It was quite a warm day, so we stopped at some sort of café on the way back for lunch. Annabeth had gone to the bathroom, and Clarisse's thundering expression as she stared at me from across the table was worthy of Zeus himself.

Our quest was simple. It shouldn't have been as easy as a walk-in-walk-out kind of procedure, but, unfortunately, that's what it was. Annabeth reckoned it was just a ruse to get us out of camp. Turns out she was right, but I had been having so much fun holding big balls (I guess) of water over unsuspecting campers and dropping them. I think after about six sodden kids complained to Chiron, he figured he better let us out for a little while. So we left. It wasn't really a quest, we were just delivering a parcel to Hermes' office. (I didn't know he had one, but it was literally just a post office for the gods. I don't know why they needed a post office, but, well, they're the gods, I guess. They have everything.) Anyway, there were no monsters. NONE. It was weird.

Annabeth weaved back through the empty tables, and pulled out the chair next to me. I put my arm around her shoulders, in a sort of awkward side-by-side hug. She leaned into me and let out a deep sigh. I pulled her closer.

We sat like that until Clarisse returned. All three of us stood and paid, before walking out into the street. We were restless. Sure, fighting monsters was hard, and dangerous, but it was also fun. And surprisingly time consuming. So yes, of course, we were bored.

The streets were a little cleaner in this part of town, not by much, mind you, and the buildings were definitely not high rise apartments. My guess is we were somewhere in Queens.

I didn't exactly have time to find out, though, before a blue line/laser thing appeared in the sky. At first I thought it was just me, but as it got closer and closer, I realised it was probably a threat. I nudged Annabeth.

"Wise Girl."

"Seaweed Brain."

"You might wanna look up."

"What? Oh." She looked up. "Ooooh," she gasped, her eyes wide with surprise. Then her awesome brains kicked in.

"Alright. Clarisse?"

"Yeah, what is it?"

"Threat incoming. We need cover."

"Ok," she mumbled. Then "Oh sh*t YES!" as she turned her head to the sky.

I glanced at her. She was no longer slumped over and moping. She stood up straight, and looked wide awake and energised. In one hand she held her spear, and the other a sword she'd pulled from who knows where, and was running towards a nearby awning.

The laser was getting closer. Following Clarisse's lead, I uncapped Riptide, and searched for a nearby source of water. Nothing. Well, nothing I could access without completely destroying half the area's sewage system, so yeah, nothing.

"Annabeth!" I called out. She had moved further back. From the general direction of her gaze I could tell she was calculating how much time we had until the laser hit.

"What is it?" A wind had picked up, whipping her hair about her face.

"Code Dry," I turned to face her. "There's nothing close enough."

"We'll just have to hope we won't need it then," she tried to sound upbeat and positive, but I could tell she was nervous. "We need to move."

Together, we ran towards shelter.

The laser hit the Earth.

There was no explosion. Instead, a massive purplish void appeared, right where the laser had struck. I could feel Clarisse tense up next to me, ready to spring into action. But I was focused on Annabeth.

"Wise Girl," I muttered, trying not to move my mouth. "What. Is. That."

"A portal," she breathed, her eyes shining. "I've never seen one before. I read about one somewhere, an Einstein-Rosen Bridge. This isn't anything like it," She turned to face me. I'd never seen her so excited and nervously terrified before. "Percy," Her voice was barely more than a whisper. "This is something else."

They were aliens. There was no other explanation. Fortunately, celestial bronze worked just as well on them as it did on monsters. Unfortunately, the three of us were outnumbered. Heavily.

They just kept on coming. The creatures didn't really have a strategy, or, it seemed, any form of intelligence. They had one mission, to kill.

We stood together facing the portal. We were in a line, far enough apart that you could swing a sword in between us, and close enough that they couldn't get past.

The aliens were dumb, to say the least. They had pale, clammy grey skin, a bit like Gollum, from The Lord of The Rings. They wore armour of some sort, but I never really got a good look at them, they were coming so quickly.

I stabbed, deflected, stabbed again, pommelled some in the head, they were quite easy to kill. I felt like one of those Jedi knights from Star Wars. Some of the ones that came after me had blaster guns, so I activated my watch. A full shield sprang from it, protecting me from the brunt of the impact. Actually, most of them came at me. I realised Clarisse was sending most of them to me, and Annabeth, as well. I figured now was a best time as any. I drove Riptide into the ground in front of me. As if I'd dropped a pebble into a pond, the ground rippled outwards. I felt the familiar tug in my gut, and pulled at it, I needed something bigger.

The Earth quaked. Yeah, an earthquake. Pretty cool, but also pretty hard to explain to anyone who knows that North America is on one tectonic plate, and the edge of it is nowhere near New York. Anyway, I rode the unstable motion through the aliens, impaling them this way and that. Within about two minutes, they were all dead. And I was extremely drained. I dropped my sword and staggered backwards. Annabeth rushed over to me, catching me as I fell, and half dragged me back to the shelter, while Clarisse beat up the last few stragglers. I attempted to stand, but Annabeth had other ideas.

"No, don't try to get up, Seaweed Brain." She pushed me back down, and fed me some ambrosia. "Stay there. We'll handle the rest of them."

I pretended to agree with her, and she rushed back towards Clarisse to help. The two of them made short work of the final wave of aliens.

I was suddenly aware of a huge presence on the other side of the portal, about to push through. I tried to warn them, I had no clue what it was. The alien's leader? No, it was too much brunt. It was more likely that the smaller aliens had been sent through to wear us out, and this was the 'secret weapon' or something. Wow, Annabeth was rubbing off on me. Speaking of…

"ANNABETH! THE PORTAL!" I yelled at her, trying to get her attention. I didn't see her turn and fight the colossal alien. I didn't see anything that happened, because after she looked back at me, eyes wide, the giant monster looming up behind her, I passed out.

A/N: POV is subject to change, I'll specify whose it is though. Please feel free to review, or don't, it's your choice. Thanks for reading!