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Clash of Heroes-The Fall of the Mist

Summary:

For thousands of years, the Mist has kept the mortal world blind to the gods, monsters, and demigods walking among them. But now, the Mist is falling—and the world is starting to see. In the aftermath of the Battle of New York and the defeat of Gaea, strange events are spreading across the globe. Monsters are appearing in cities, ancient powers are awakening, and people are discovering that the myths they thought were nothing more than stories are real. To the mortal world, the demigods are dangerous, unpredictable, and powerful enough to threaten humanity itself. To the demigods, however, the mortals are the ones who have declared war. The Avengers are caught in the middle, forced to confront an enemy unlike anything they have ever faced: teenagers and young adults carrying the blood of gods, wielding impossible abilities, and fighting with centuries of myth behind them. As fear turns into suspicion and suspicion turns into violence, heroes from two completely different worlds are pushed toward a confrontation neither side truly understands. The Avengers have fought aliens. The demigods have fought monsters and gods. But neither side has ever fought the other. When the Mist falls, the heroes will clash.

Notes:

Hello everyone. This is my first Fanfic, and it's basically a war between Demigods and SHIELD. HYDRA does not exist, Greece is a major superpower, and Leo Valdez returns around 1-2 months after going to Calypso. Demigods emit UV radiation (Read the KC-PJO crossover), and there is a OC son of Hades. Without further ado, here is the first chapter,

(See the end of the work for more notes.)

Chapter 1: Tanning Beds and Bronze Dragons

Chapter Text

Manhattan did not sleep, but now it did not breathe either. The city was choked under a permanent shroud of pulverized concrete dust, pulverized Chitauri armor, and the sharp, burning tang of ozone that refused to clear from the Atlantic air. Down on the fractured asphalt of Lexington and 42nd, the iconic yellow cabs were gone, replaced by a roaring, relentless phalanx of yellow bulldozers, structural cranes, and National Guard transport trucks. Heavy steel cables groaned as they dragged the severed, bio-mechanical limbs of alien leviathans out of smashed storefronts, leaving dark, iridescent stains on the historic stone.

Everywhere, the roads were broken, buckled upward like miniature mountain ranges from underground explosions. The constant, rhythmic clack-clack-clack of pneumatic drills echoed off the glass skeletons of half-destroyed skyscrapers, drowning out the distant, wailing sirens of fire engines still chasing pockets of burning alien technology. To the average mortal, it was a city rebuilding from an unprecedented extraterrestrial terror.

But beneath the surface, the air was twice as thick. For anyone who knew where to look, the shattered facade of the Empire State Building—the very anchor of Olympus—stood silent and scarred, its mystical foundations trembling from the sheer violence of the mortal war that had raged around its base. The Mist hung heavy over the ruins, twisting the wreckage of lightning scorches into ordinary gas main explosions, yet some mortals were clear sighted by the sudden shock to their brains: Aliens were real and so were Norse Gods.

The S.H.I.E.L.D. Helicarrier hung over the gray expanse of the Atlantic, an impossible titan of steel cutting through the clouds. It was a terrifying testament to human engineering and stolen alien mechanics. Four massive, multi-tiered turbine engines groaned with a low, deep vibration that rattled through the atmosphere, keeping the three-thousand-ton airborne fortress afloat. Its dual flight decks swarmed with personnel moving like furious ants, making sure that tomorrow’s newspapers wouldn’t have “TITANIC 2.0: FLYING AIRCRAFT CARRIER DISASTER!” printed on the headlines. Crew members in high-visibility vests scrambled between rows of parked Quinjets, while engineers replaced burnt-out reflective panels to restore the ship’s optical cloaking array before sunrise.

Inside, the command bridge was a sunken amphitheater of glowing blue glass and soft, rhythmic electronic chimes. Rows of glass-panel workstations lined the perimeter, manned by hyper-focused analysts tracking global data packets, cellular frequencies, and international satellite telemetry. At the center of the room sat the master holotable, projecting a rotating, wireframe model of the Earth bathed in flickering tactical data. The air smelled sharply of sterilized plastic, cooling server racks, and stale coffee. Through the towering, wrap-around windshields, the horizon stretched endlessly,

In the centre of the command bridge, Nick Fury quietly watched the multiple monitors with his single eye. Suddenly, a blip appeared on the radar.

“Sir! A unregistered aircraft heading towards New York!”

This better not be another New York based invasion.” Fury growled. “Well, then, what is it?”

“It’s emitting high levels of ultraviolet energy, sir!”

“So what the hell does that mean?”

“Well, it’s either a enormous tanning bed or some kind of vibranium or laser tech.” Agent Coulson replied smoothly.

Fury glared at him. “Get me a volumetric Lidar render of it.”

An agent at the opposite end of the room frowned at his screen. “Sir, it seems to be a metallic robot in the shape of a large bird.”

Fury raised his eyebrows and walked over to it. On it was a blurry shadow of some kind of winged aircraft, made of an unidentifiable metal, with … was that flapping wings? “Well, I’ll be damned.” He said.

He walked over to the radio and picked it up. “Barton, Rumlow. Secure channel Alpha-One. We have an Outlaw inbound over the Atlantic. It just crossed into domestic airspace. It’s a single Snooper, looks like a oversized bird, and it's kicking off enough UV radiation to light up Manhattan.”

“Copy that Boss. An oversized bird. Terrific. Because a giant space-whale flying through a skyscraper last week wasn't enough. Did someone forget to close a gate at the zoo, or are we talking another 'Asgardian family drama' situation, Boss?” Clint replied resignly.

“Stark claims it’s not his, and the Lidar says it’s made of solid metal. I want it intact, Barton. Don't melt it.”

“Solid metal, flaps its wings, radiates like a tanning bed. Copy that. I’ll make sure to use the polite arrows. Rumlow, you copy all that? Try not to dent the giant radioactive pigeon before we can ask it for registration papers.”

Back on the Helicarrier, Fury sighed. He looked at Coulson. “Why is everyone using tanning bed metaphors?

Coulson shrugged and walked away to who-knew-where.

Over the Atlantic, flying on a Celestial Bronze dragon, with Calypso’s arms around his waist, flew Leo Valdez - Supreme Commander of the Argo II, Bad Boy Supreme, The Super-Sized McShizzle (and a really good taco chef). As the skyline of New York came into view, he whooped, punching the air.

“YEAH! GUESS WHO’S BACK! IT’S LEO MCSHIZZLE, BAD BOY SUPREME!”.

Festus clicked and whirred happily, looking back at Leo.

“Yeah, that’s right buddy! New York, the city of Tacos and the best motor oil you’ll ever have!”

Calypso laughed softly over his shoulder.
“Calm down Leo. We still haven’t arrived.”

Leo smiled sheepishly.
“Sorry. It’s just that I haven’t seen my friends in all this time.”

“Well, I suppose It’d be nice to … socialize a bit. I might also have some apologies in order.” Calypso replied sadly.

Leo wondered at what she might have meant about apologies, but at that second, Festus let out what seemed to be a growl. Not even his normal whirring alarm, but a full-on growl.

Leo frowned.
“What is it, buddy? There’s nothing here”
At that second, his senses wet off. His sixth sense for machines told him that there was aircraft right next to him

At that second, a sleek, angular stealth jet—pitch-black, and sporting massive twin engines that roared with a terrifyingly low, bass-heavy vibration—dropped its active optical cloaking. It materialised out of thin air directly to their right. A second later, a twin jet uncloaked on their left flank, boxing them in.

“Attention unidentified aircraft,” a electronic, amplified voice boomed from the left jet's external speakers, cutting through the rush of the wind. “You are in violation of restricted United States airspace. Maintain your current altitude, cease all erratic movements, and prepare to follow our vector for an immediate forced landing at Floyd Bennett Field.”

“Uh,” Leo blinked, his brain rapidly trying to process the high-tech weaponry currently aimed at his face. “Clarisse? Is that you? Did your dad bless you again? Or did you hold my cabin at spearpoint and trade their lives for weapons again?”

Inside the cockpit of the lead Quinjet, Clint Barton adjusted his grip on his compound bow. He put on his backscatter glasses, into a digital spectrum of energy. When he looked at the flying monstrosity, it looked like a second sun. they were a massive, blindingly white pillar of high-intensity ultraviolet radiation. He yanked of his glasses, blinking the spots in his vision off.

“Fury, I’ve got visual on the target,” Clint spoke into his comms. “And you’re right, it’s a big metal bird. Kicking off enough UV radiation to light up Manhattan. Looks like a gigantic tanning bed with wings. And it’s got a couple of teenagers riding shotgun.”

“Bring them down intact, Barton,” Nick Fury’s gravelly voice crackled back over the encrypted channel. “We don’t want another harassment of minors case. Rumlow, your STRIKE team is primary capture. Deploy the EMP harpoons. Secure the pilot and the technology.”

Down below the dragon, the secondary Quinjet lunged forward. Its belly bays rotated open, revealing two heavy-caliber tactical harpoon launchers gleaming with blue, electromagnetic energy rings.

“Leo, they’re preparing to attack!” Calypso warned, sensing the disturbances of the air around the harpoons, despite her weakened powers.

“Oh, no you don’t!” Leo’s eyes widened as his hands flew to his magical toolbelt. “Nobody shoots the dragon! I spent three weeks calibrating these bronze joints!”

His mind raced with frantic, hyperactive calculations. He didn't know who these guys in the tactical stealth gear were, but he knew how technology worked, and he knew these jets were relying heavily on digital targeting systems.
His fingers dove into the pockets of the toolbelt, pulling out components with the frantic speed of a machine gun: a thick spool of mortal copper wire, a jagged strip of glowing, volatile Imperial Gold scrap left over from the Roman legion, a handful of raw magnesium powder mixed with celestial bronze and a rusted tin can he’d found on Ogygia.

With pure Hephaestus ingenuity, Leo twisted the copper tightly around the volatile Imperial Gold, creating a crude, hyper-dense magnetic capacitor. He packed the hollow tin can with the magnesium, raw phosphorus and celestial bronze dust, jamming the gold core right into the centre.

“Hold on to your hair, Sunshine!” Leo yelled, hooking the makeshift copper leads straight into the sparks firing from Festus’s open chest furnace. “Time for a little Valdez special!”

The lead Quinjet’s weapons display chimed a solid, lethal green. “Target locked,” Rumlow called out. “Firing harpoons in three, two—”
Leo snapped his fingers, sending a tiny spark of his own white-hot, demigod fire into the tin can, and hurled the device straight into the sky and urged Festus into a dive.

“Dive, Festus, Dive! Dive like your life depends on it, and considering your circuit board, it probably does!”

Festus folded his wings and dropped like a stone, with one whooping Latino and one terrified titan onboard.

The device detonated directly between the Quinjets.

The magnesium and phosphorus ignited into a brilliant, chemical white flash that when mixed with the celestial bronze instantly bloomed into a massive, shimmering cloud of suffocating bronze dust, completely blinding the optical sensors of both jets.

Simultaneously, the volatile Imperial Gold core overloaded under the heat. The divine metal violently destroyed itself, forcing a massive, concussive kinetic-electromagnetic shockwave outward through the copper coils.

The magical EMP hit the Quinjets like a wall.
Inside Clint’s cockpit, the heads-up displays violently flickered, sparked, and went entirely black. The navigation systems glitched into manual backup mode, and the twin engines sputtered, forcing the high-tech stealth jet to dip into a sudden, unguided dive. Rumlow’s targeting screens died completely, his harpoon lines locking up before they could fire.

Up in low Earth orbit, S.H.I.E.L.D.’s multi-spectrum surveillance satellites tracking the massive UV radiation trail saw an enourmus burst of ultraviolet, electromagnetic and thermal energy, comepletely cloaking the area. When it cleared, only two energy signatures remained

“What the hell was that?” Rumlow shouted over a crackling, half-dead radio, struggling against the heavy manual controls of his dipping plane. “My HUD is fried! We've lost primary power!”

Clint Barton stared out the cracked cockpit window into the swirling cloud of glittering bronze smoke. He pumped the manual thrusters, stabilizing the Quinjet just as the backup engines kicked back online.
But the sky was already empty.

Clint keyed his static-heavy comms, shaking his head in absolute disbelief. “Fury, we lost them. Target dropped a makeshift electronic pulse out of thin air. It completely blinded our sensors and cooked our tracking metrics. The big bird is gone.”

Miles away, dropping fast through the grey New York clouds toward the safety of the city's labyrinthine industrial shipping yards, Leo laughed hysterically, his fingers still smoking with small sparks of fire.

“And that,” Leo shouted over the wind, guiding a clicking, triumphant Festus down into a steep dive, “is a Valdez Special! Welcome to New York, baby!”