The backyard of Naganohara Fireworks was bathed in twilight, the evening breeze carrying the sweet scents of gunpowder and golden candy as it brushed past the eaves. Yoimiya crouched in front of the testing table, her ponytail swaying to the tune she hummed. Soot from the charcoal dusted her nose and fell onto the **"Elemental Amplification Device"** in her hands—a Liyue mechanism crafted by Ling Feng using the blind box system, its core embedded with Electro crystals harvested from the Thunder Manifestation. Just as she brought the firestarter to the fuse, the crystal erupted in a blinding purple light. A torrent of intertwined lightning and flames shot into the sky, exploding into a swarm of glowing Electro Crystalfly silhouettes.
"Whoa!" Yoimiya leaped onto a wooden crate, watching as the Crystalfly swarm coalesced into a massive image of the Raiden Shogun wielding her sword. Suddenly, a bolt of lightning struck the courtyard wall, and Ayato, who had been next door sampling tri-colored dango, froze in place—the shockwave had tousled his meticulously styled hair, making it look like Razor's Electro claws had raked through it.
"Yoimiya!" Kujou Sara's furious shout echoed as her Electro-powered airship descended. Before the Tenryou Commission's arrows could be fired, the Crystalfly swarm was dyed with Pyro energy, transforming into a cascade of crimson-purple fireworks. The guards' armor reflected the shimmering light, resembling thousands of miniature thunderclouds rolling through the streets. Children chased the Crystalfly with **"Naganohara Special Thunderfire Sticks,"** and one bold kid stuck his stick into a pond, creating a splash that froze midair into Kokomi's **"Kurage's Oath"** illusion.
"What is this chaos?!" Kujou Sara's arrow pointed at the testing table, only to see Yoimiya frantically trying to control the malfunctioning device. The Electro crystal had melted into liquid under the heat, seeping into the firework tubes. The tubes suddenly split open, revealing a three-meter-tall **"Thunder Manifestation Replica"**—a biomechanical construct modeled after the Thunder Manifestation's remains, its wings scattering electrified firework dust with every flap.
"Look! The Shogun's thunderbird!" Amid the crowd's gasps, the mechanical beast soared into the sky. As it passed Tenshukaku, its tail feathers brushed against the Sacred Sakura, scattering cherry blossoms gilded with Electro energy. They drifted down onto the Shogun's puppet's naginata. Kujou Sara, who had been patrolling, watched in horror as the construct's chest emitted a beam of lightning identical to the **"Narukami Ogosho's Divine Punishment,"** melting the incense burner in front of the Statue of the Omnipresent God into a glass cup—etched with Yoimiya's crooked **"Naganohara Special"** mark.
"Using Electro to reshape the incense burner—this is the latest祈福仪式 (blessing ritual)!" Yae Miko's illusion emerged from the lightning, her fox tail curling around a new light novel, *Reincarnated as a Thunderbird and Fed by the Guuji*. With a flick of her finger, a thunderstorm descended from the statue's palm, striking the mechanical beast until it smoked and crashed. From the wreckage burst hundreds of Pyro Whopperflowers, chasing after the Tenryou Commission's official documents to devour them.
"Sangonomiya's latest technology!" Kokomi's paper crane arrived just in time. "These improved Whopperflowers specialize in eating bureaucratic waste~" Kujou Sara's bowstring quivered with rage, but the Shogun's puppet summoned a thundercloud, frying the Whopperflowers into crispy, violetgrass-flavored popcorn. Children scrambled to fill their pockets, while Sayu rolled away with a bag, only to be blown into the air like a dandelion by residual Electro energy.
Amid the chaos, Yoimiya dragged Ling Feng into the storage room. The Elemental Amplification Device's core was still unstable, its Electro light illuminating a corner where **"Delusion Modification Blueprints"** lay—the Fatui's signature crimson patterns glaring ominously. "So that's why the Fatui kept buying fireworks tubes..." Yoimiya crushed the blueprints in her hand, her Pyro energy burning the scraps into *Genshin Impact*-style elemental reaction sparks.
As night deepened, the Shogun's puppet stood alone atop Tenshukaku. She gazed at the Electro crystal hovering in her palm—a fragment from the crashed construct. Encased within was Naganohara's century-old firework catalog, each frame capturing the smiles of Inazumans gazing at the night sky. A drop of unhardened Electro residue dripped from her naginata, etching a crooked fox doodle into the ground.
"How about a Shogun-themed firework next time?" Yoimiya called up as she cleaned up the wreckage, assembling a new **"Thunderfire Narukami Tube."** Ayato, fan in hand, picked up a crystal fragment from the debris and sculpted it into the Kamisato crest with his Cryo powers. "Perhaps we could combine fireworks and sword dances at the Irodori Festival."
The night sky above Watatsumi Island lit up with Kokomi's special **"Jellyfish Fireworks,"** each glowing tentacle holding a **"Peaceful Coexistence"** pouch. Kujou Sara, her face dark, confiscated the last batch of Whopperflower remains, unaware of a pair of violet eyes watching from the shadows—Scaramouche injected the crystal fragment into a Delusion, and on the factory assembly line, the slowly forming **"Thunder Calamity Mech"** bore the Fatui's Aurora Borealis emblem on its chest.
As the first rays of dawn touched the Sacred Sakura, Ling Feng's blind box shop quietly hung a new sign: **"Naganohara Special: Eternal Fireworks Blind Box."**