The sun was high by the time Kaelith reached the outskirts of Oakhaven. Following the directions from the mercenary board, he found himself standing before the Grave of the Weeping Oak. It wasn't a cave, but a massive, sunken stone structure swallowed by the roots of a giant, dying tree.
The air near the entrance felt heavy, like a physical weight pressing against his skin. It was the scent of stagnant mana and old rot.
"D-Rank," Kaelith whispered, adjusting the strap of his cloak. "Logic says a Level 5 with a broken core should stay in the meadows and hunt slimes for another week. But slimes won't fix my core. I need something with a heartbeat."
He checked his new sword. The Black-Iron Vindicator felt solid at his hip. He didn't have a party. He didn't have a map. He just had his instincts and the cold, blue screen of the system.
The Descent
As Kaelith stepped into the dark, the temperature plummeted. He lit a small flint-lamp, its orange glow dancing off the moss-covered walls.
[ AREA ENTERED: WEEPING OAK RUINS ]
[ DIFFICULTY: D-RANK ]
[ CURRENT OBJECTIVE: SURVIVE THE FIRST FLOOR ]
The silence was absolute, until it wasn't. From the shadows of a collapsed pillar came a low, wet clicking sound. Two Blight-Spiders—each the size of a large dog—dropped from the ceiling. Their many eyes reflected the orange light of his lamp.
"Fast," Kaelith noted, his mind already tracing their movements. "But their legs are brittle."
One spider lunged, firing a glob of sticky, acidic silk. Kaelith's body felt sluggish, his Level 5 Agility barely allowing him to roll to the side. He felt the heat of the acid as it hissed against the stone where he had just been standing.
He didn't have the luxury of a mistake. He drew the black-iron sword. The weight was significant, and for a second, his weak wrist buckled.
Grit your teeth, he told himself. Don't let the sword carry you. You carry the sword.
He lunged forward. As the second spider reared back to bite, Kaelith used the Ex-Rank mastery in his mind to find the exact point of failure in the creature's exoskeleton. He didn't swing for the head; he thrust the heavy blade through the joint of its front leg and twisted.
The spider screeched as its leg snapped like dry kindling. Kaelith didn't stop. He followed through with a heavy overhead strike, the weight of the black iron doing most of the work as it crushed through the spider's thorax.
The Trial of the Deep
The first spider was dead, but Kaelith was already gasping for air. He pulled the cores and moved on, but the ruins grew more treacherous.
In a narrow corridor, the floor gave way to a Pit of Whispers. Kaelith barely caught the ledge, his fingers digging into the damp stone. From the pit rose Vine-Wraiths—undead vines animated by the dungeon's rot. They didn't have eyes, but they felt his warmth.
"Persistent," Kaelith growled, hauling himself up.
He was surrounded. Three wraiths lashed out like whips. Kaelith moved with a precision his Level 5 body shouldn't possess. He parried a vine, felt the heavy vibration in his arm, and realized he was being slowly strangled by the environment itself.
His Stamina was draining. Every swing felt heavier. A vine caught his ankle, dragging him toward the pit.
"No," he hissed. He didn't just swing his sword; he used the flat of the blade to pin the vine and stepped on it, using his weight to snap the magical tether. He was bleeding from a dozen small cuts, his cloak tattered. Think. If I can't overpower them, I have to outmaneuver them.
He spotted a cracked mana-crystal in the wall nearby. Using a precise throw of a discarded stone, he shattered the crystal, causing a localized mana-burst that distracted the wraiths long enough for him to sever their main roots.
He stood in a pile of severed vines, his heart hammering against his ribs. He was nearing his limit.
The Siege of the Inner Sanctum
Finally, the corridor opened into a wide, circular chamber. In the center stood the Blighted Treant—a massive, twisted creature of rotted wood and glowing purple veins. It was the Boss.
The Treant didn't wait. It roared and slammed a massive, root-like arm into the ground. Kaelith rolled, but the shockwave threw him against a stone pillar. The air left his lungs in a sharp wheeze.
Move. You have to move.
He scrambled up as a second root pierced the ground where his head had been. He lunged forward, hacking at the Treant's leg, but the Black-Iron Vindicator merely bounced off the bark. The creature was too dense.
For ten minutes, it was a dance of death. Kaelith was bleeding from his forehead, his vision blurring. He slashed at the purple veins, hoping to bleed the creature's mana, but the Treant simply regenerated, its massive limbs swiping the air with relentless force.
A heavy branch clipped Kaelith's ribs. He heard a sickening crack and was sent skidding across the floor. He coughed up blood, his hand barely maintaining its grip on the sword.
"Is this it?" he whispered to the cold floor. "Dying in a hole because I'm too weak to even scratch a tree?"
The Treant loomed over him, raising both massive arms for a final, crushing blow. Kaelith looked at his sword. He felt the mana "leaking" from his core, wasting away into the air as it always did.
If I'm going to die, he thought, a spark of cold fury igniting in his chest, I'm not letting this mana go to waste.
He didn't just stand up; he forced himself into a low stance, ignoring the agony in his ribs. He stared at the leaking energy. He pictured his hand squeezing that leak, forcing the air into a straw, focusing every bit of his escaping life force into the very tip of the black-iron blade.
The sword began to hum—not a noble ring, but a desperate, violent vibration.
"Concentrate..." he hissed through bloody teeth. "Squeeze it all... into one... point!"
The Treant lunged.
"NOW!"
Kaelith didn't swing wildly. He stepped into the monster's reach, meeting the descending trunk with a single, focused thrust.
[ CONCENTRATED MANA STRIKE ]
The blade collided. A burst of blinding blue light erupted, the mana piercing through the rotted wood like a lightning bolt. The Treant's shriek echoed through the ruins as it was cleaved nearly in half from the inside out.
Kaelith collapsed before the creature even hit the ground. He lay in the dirt, his body completely spent, as the blue screen flickered one last time before his eyes.
[ LEVEL UP! LEVEL 5 -> 7 ]
[ SKILL LOGGED: CONCENTRATED STRIKE (RANK F) ]
[ NEW FEATURE: AUTO-ABSORPTION ]
[ CORE REPAIR: 1.6% -> 3.0% ]
He had survived. But as the darkness took him, he knew he was lucky to be alive.