The Extra is a Hero?-Chapter 318: THE INNER SANCTUM

Chapter 314: The Inner Sanctum

​The heavy wooden door of the Royal Archives groaned shut behind us, sealing us in darkness. But it wasn’t the dusty, dry darkness of a library vault.

​It was humid. Hot. The air smelled of wet earth, ozone, and something metallic—like blood left out in the sun. 𝐟𝐫𝕖𝗲𝘄𝚎𝗯𝕟𝐨𝕧𝐞𝚕.𝕔𝕠𝐦

​"Nova, widen the beam," I whispered.

​The light from my wrist-comp cut through the gloom, revealing that we were no longer in a man-made structure. We were inside the organism itself.

​The Royal Archives weren’t just a room; they were an atrium hollowed out of the petrified heartwood of the World Tree’s central taproot. The walls weren’t stone—they were massive, curving walls of cellular cellulose, glowing with a faint, dying amber light. It felt less like a vault and more like the inside of a gargantuan lung.

​"It’s... breathing," Leon whispered, his hand resting on the wall. He pulled it back quickly. The wood was warm and pulsing.

​"It is struggling," Selena corrected. She walked ahead, her movements silent and efficient. Her [Mantle of the False Root] shimmered, blending her silhouette with the amber walls. "Respiration rate is irregular. Mana circulation is blocked in forty percent of the vascular tissue."

​She stopped at the edge of a drop-off.

​"Target located."

​We joined her at the edge. The "floor" of the Archives dropped away into a massive, cavernous hollow that stretched down into the earth. It looked like a bio-organic cathedral, vast and dizzying.

​But it wasn’t the scale that made my stomach turn.

​It was the veins.

​Running along the massive white roots were thick, pulsing arteries of black sludge. They looked like varicose veins on a titan, throbbing with a sickly purple light.

​"The Rot," Leon breathed, his face pale in the wand-light. "It’s everywhere."

​"No," I said, activating my [Quantum Analysis Mind]. The purple fractal patterns flared in my vision, overlaying the biological nightmare with hard data. "It’s not just ’everywhere’. Look closer, Leon."

​I zoomed in on a cluster of the black veins near the bottom of the cavern.

​[Target Analysis: Nether-Parasite]

[Rank: A+]

[Type: Abyssal Flora / Symbiotic Leech]

[Status: Cultivated]

​"Cultivated?" I muttered.

​I pointed down. "Leon, look at the spacing. Look at the distribution."

​Leon squinted. The golden aura of his eyes flared as he focused. Then, he gasped.

​The black veins weren’t spreading randomly like a disease. They were arranged.

​They grew in perfect, parallel lines, spiraling down the main root. At regular intervals, massive crystal spikes had been driven into the wood, acting as trellises for the black vines to climb.

​"They’re not infected," Leon realized, horror dawning on him. "They’re... planted."

​"It’s a farm," I said, my voice cold. "The Council isn’t fighting the Rot. They’re growing it."

​We descended the spiral ramp carved into the bark, moving deeper into the sanctum. The heat increased, and the humming sound—a low, dissonant vibration—grew louder.

​"Why?" Leon asked, gripping his sword. "Why would they poison their own god?"

​"Efficiency," Selena answered before I could. She walked up to one of the black vines. It was as thick as a man’s torso. She raised her hand, hovering it inches from the pulsing surface. "The World Tree produces ’White Mana’—pure, life-giving, but slow to regenerate. These parasites..."

​She tapped the black vein.

​PULSE.

​A shockwave of purple energy rippled through the room.

​"...consume the White Mana and excrete ’Dark Mana’," Selena finished. "It is volatile, corrosive, but 300\% more potent in terms of raw energy output."

​"They’re fracking the World Tree," I realized, the gamer terminology slipping out. "They’re trading long-term survival for short-term power. They’re weaponizing the tree."

​We reached the floor of the hollow. Here, the evidence of industry was undeniable. There were metal catwalks bolted directly into the living wood. There were glass tanks filled with glowing green liquid where smaller parasites were being incubated.

​And in the center of the room, surrounded by a ring of black crystals, was a workstation.

​"That’s not Elven tech," I noted, spotting the jagged iron aesthetics. "That’s Nether-Iron."

​I walked up to the workstation. A leather-bound ledger sat open on the table.

​I flipped through the pages. It wasn’t written in Elven. It was written in a cipher I recognized from the Arc 3 raid dungeon.

​The Cult of the Black Sun.

​"Valen isn’t just a radical," I said, tracing the jagged runes. "He’s a collaborator."

​"Michael," Leon warned, his voice tight.

​I looked up.

​The shadows between the roots were moving.

​It wasn’t the guards. The Silver Knights didn’t patrol down here. The air shifted, smelling of rotting flowers and musk.

​From the dark recesses of the farm, figures emerged. They looked like dryads—beautiful, tree-like spirits—but their bark was black, their leaves were thorns, and their eyes burned with the same purple light as the parasites.

​[Enemy Encounter: Corrupted Dryad]

[Rank: B+]

[Status: Hostile / Hungry]

​"Intruders..." one of the Dryads hissed. Her voice sounded like wood splitting. "Fertilizer... for the crop."

​Selena stepped forward. She didn’t draw her weapon. She simply looked at the creature with her cold, obsidian eyes.

​"Analysis: Corrupted Spirit," Selena stated. "Biology altered by Abyssal Mana. Reasoning capability: Null. Recommendation: Pruning."

​She snapped her fingers. Her [Shadow-forged Scythe] materialized in her hand, the blade smoking.

​"Leon," I said, drawing my dagger. "Don’t hold back. These aren’t elves anymore."

​Leon hesitated for a fraction of a second, looking at the twisted mockery of nature. Then, he set his jaw. The holy sword ignited with a golden flame.

​"Right," Leon said. "Weeding time."

​The Dryads shrieked and charged.

The shriek of a Corrupted Dryad is not a sound meant for mortal ears. It is the sonic equivalent of a violin string snapping—a high-pitched, dissonant wail that grates against the bone.

"Fertilizer!" the lead Dryad screeched, her limbs elongating into jagged, thorn-covered whips.

Three of them rushed us, moving with a jerky, unnatural speed. They didn’t run; they skittered, their root-like legs tearing up the sanctuary floor.

"Leon, front! Selena, flank!" I shouted, dropping into a crouch.

"On it!" Leon roared.

He didn’t defend. He attacked.

[Lionheart Sword Style: Form 3 - Rising Sun]

The Hammer—which Leon had modified to channel his sword arts—erupted with a blinding golden aura. He swung it in a massive upward arc.

WHOOSH.

The golden flame collided with the lead Dryad.

Usually, plant monsters are resistant to blunt force, but the Holy affinity of the Lionheart flame acted like acid against the Rot.

The Dryad howled as her thorny limbs turned to ash upon contact.

​

(To be Continued)