Extra's Revenge: Reincarnated As A Slave-Chapter 153: Growth (Part 1)

Three Years Later

Rey stood at the Sanctuary’s main gate, his appearance transformed by time and experience.

At nineteen years old by this world’s reckoning, he’d grown taller, his frame filling out with muscle earned through constant training. His distinctive black-and-white hair now reached past his shoulders, tied back in a practical style.

His eyes—gray with those telltale blue and red glints marking Nephilim heritage—carried a depth that suggested experiences far beyond his apparent age.

Most striking was the mystical pressure radiating from him.

Subtle but undeniable, it marked him as someone who’d transcended normal limitations through dedicated cultivation.

"Heading out for training again?" the gate guard asked, a Nephilim warrior named Torin who’d become familiar with Rey’s routine over the years.

"Yes," Rey confirmed, adjusting the equipment secured across his body. Multiple high-grade Artifacts, carefully maintained and upgraded through the Sanctuary’s resources.

"I’ll be back before the week ends."

Torin nodded, activating the gate mechanism without further questions.

Rey’s excursions into the Labyrinth had become regular occurrences, his growing strength making him one of the Sanctuary’s most capable warriors despite his relative youth.

The massive gates opened, and Rey stepped out into the darkness beyond the protective dome.

The transition was immediate and jarring.

Inside the Sanctuary, the environment felt almost normal—light, breathable air, stable mystical energy. Outside, oppressive Chaos Energy saturated everything, the ancient ruins radiating hostility that would overwhelm unprepared practitioners.

But Rey moved through it with practiced ease, his Ether circulation adapted to function despite the interference. Three years of training in these conditions had transformed what should have been crippling distortions into merely annoying obstacles.

He descended into the Labyrinth’s depths, following paths he’d mapped extensively over countless expeditions. The upper levels were familiar territory now, their traps and hazards long since neutralized or circumvented.

As Rey ventured deeper, he began encountering them.

Chaos Dwellers, frozen like statues throughout the passages.

Tier 9 specimens stood motionless in corridors, their shifting forms locked in unnatural stillness. Tier 8 Dwellers occupied chambers in silent vigil, their mystical signatures present but dormant. Even Tier 7 creatures—powerful enough to threaten experienced Guards—remained perfectly still as Rey passed.

A smile crossed his face as he walked among them.

They weren’t truly frozen.

They were commanded—held in stasis through Chaos Art techniques that dominated their rudimentary consciousness and forced absolute obedience.

Every single one was his.

Undead created through the Hollow Technique, Chaos Dwellers killed and resurrected as servants bound to Rey’s will. Over three years of systematic hunting, he’d built an army that waited in the darkness for his commands. 𝙛𝓻𝒆𝓮𝒘𝙚𝙗𝒏𝙤𝙫𝓮𝒍.𝓬𝒐𝙢

Rey continued descending, eventually reaching a boundary marked by his own mystical wards.

Beyond this point lay territory he hadn’t yet claimed—passages still occupied by hostile Dwellers that remained beyond his control.

He checked his equipment one final time.

Ten Tier 10 Artifacts—the highest grade available, acquired through a combination of Sanctuary resources, careful trading, and items brought from the surface. Each one served specific purposes in combat, their capabilities far exceeding anything he’d possessed three years ago.

’Time to expand the army,’ Rey thought, stepping across the boundary.

The passages ahead were different from the upper levels.

Wider, more elaborate, with architecture suggesting they’d been important in whatever civilization had once thrived here.

And occupied by Chaos Dwellers in significant numbers.

Rey’s enhanced perception detected approximately fifty signatures ahead—mostly Tier 9 and 8, with a few Tier 7 specimens and one particularly powerful presence that suggested Tier 6 classification.

Perfect for his purposes.

He activated his first Artifact—a detection-masking device that obscured his mystical signature from the Dwellers’ primitive senses. Moving silently, he positioned himself in a large chamber where the Chaos Dwellers congregated.

Then he deactivated the masking and unleashed his opening assault.

"Spirit Art, Convergence Technique, Sequence #3: Reality Storm!"

The chamber erupted into elemental chaos. Fire, lightning, water, earth, and wind merged into phenomena that defied natural law—flames that froze, ice that burned, earth that flowed like liquid while air solidified into cutting edges.

The Chaos Dwellers reacted immediately, their forms shifting to combat mode. But Rey’s attack operated at a level that exceeded their adaptive capabilities. The Reality Storm wasn’t just damaging them—it was fundamentally altering the environmental laws they relied on for coherence.

Three Tier 9 Dwellers dissolved entirely, their forms unable to maintain stability in the transformed environment.

Rey didn’t pause.

He activated a Tier 10 combat Artifact—a gauntlet that amplified mystical techniques by channeling stored Ether through crystalline matrices.

His next attack carried devastating force.

"Spirit Art, Inferno Technique, Sequence #2: Hellfire!"

Flames that bypassed regeneration, immortality, and divine mitigation erupted throughout the chamber. The Chaos Dwellers’ natural resistance to ordered mystical energy couldn’t save them from fire that attacked their fundamental existence rather than merely burning physical form.

Five more Dwellers collapsed, their Chaos Energy dispersing as the Hellfire consumed their coherence.

But the survivors adapted, as they always did. Their forms reconfigured to resist elemental assault, developing what might have been armor or protective layers.

Rey smiled and switched tactics.

"Chaos Art, Corruption Technique, Sequence #3: System Defilement!"

The fundamental rules governing the Chaos Dwellers’ existence twisted. Their adaptive capabilities—their greatest strength—became corrupted, causing them to develop defenses against attacks that weren’t coming while remaining vulnerable to actual threats.

Rey capitalized immediately with a combination attack.

"Spirit Art, Tempest Technique, Sequence #3: Tempest Throne!" established him as the storm’s axis, weather obeying his will instinctively. "Chaos Art, Reversal Technique, Sequence #3: Reality Backflow!" caused recent events to partially undo themselves, creating temporal confusion that disrupted the Dwellers’ coordination.

The chamber became a killing field. Lightning struck with perfect precision, wind carved through corrupted defenses, and reality’s normal flow became unreliable as past and present blurred.

Chaos Dwellers fell one after another, their forms dissolving under sustained assault from techniques that operated at sequences they simply couldn’t counter.

When only the Tier 6 specimen remained, Rey had already accumulated fifteen fresh corpses.

Time to put them to use.

"Chaos Art, Hollow Technique, Sequence #5: Death Army!"