As a Grey Knight In Naruto

(Zander: By the holy light of Titan...

We've gathered 192 Power Stones,truly, the Emperor is pleased.

I deliver 2 chapters daily, forged in the fires of caffeine and fan-love.

And for every 20 Power Stones, I unleash a bonus chapter as tribute to your glorious support!

So keep casting those Power Stones), and I'll keep purging filler content in His name.)

Chapter 50 – I am the first Primaris of the Grey

The lab beneath Konoha was silent, save for the low hum of chakra lights embedded in the walls. Hajime stood alone in the chamber he had built, smooth stone, reinforced with earth chakra and his own psychic shaping. A table lay before him, sealed with sterilization runes, and at its center, a single sealed containment pod pulsed with a gentle blue glow.

Inside floated a pale, root-like mass of tissue, his latest prize.

Hajime stood still, his tall frame bathed in soft light, halberd leaning against the wall behind him. His expression was calm, focused. But his mind was deep within itself, sifting through memories that were not his, yet now belonged to him.

He had unlocked them all.

Ten thousand years' worth of memories, from the gene-seed embedded in his flesh. Memories from a hundred Grey Knights, who had led purging flames into daemon nests, Interceptors who blinked through the Warp to cut off sorcerers before they could speak, Apothecaries who sculpted flesh and remade broken Astartes, and Librarians who tore through reality with thought alone.

He saw their lives play out one after the other.

He felt the weight of their armor. Heard the chants of liturgies in burning cathedrals. Fought alongside them against horrors that defied form.

But the one who lingered most in his mind… was a Librarian.

A warrior-monk clad in silver, who could move through the Warp with sheer will, vanishing and reappearing in rippling cracks of blue light. He had taught Hajime, not through words, but memory, how to bend the psychic dimension to teleport to another place with psychic power.

And from an Apothecary who had once pondered forbidden texts, Hajime had seen something else, files recovered from Mars, reports on the Primaris Astartes. The Apothecary had read them, analyzed the organs… but dismissed them, calling them impure deviations. A threat to the sacred design of the Emperor's chosen.

Hajime didn't care about purity.

Purity didn't matter.

Strength did.

He would not be a relic.

He would become the future.

And to do that, he needed stronger materials.

The next organ was the Sinew Coils, microscopic coils wrapped through the muscles, laced with reactive fibers that could contract with immense force, allowing for explosive power. Normally crafted from biomechanical components and enhanced with synthetic tendon fibers, none of which existed in this world.

But he had found something close.

White Zetsu.

Born from Hashirama's cells, diluted but still alive with potent regenerative properties. Designed to adapt, integrate. And more importantly… replace.

Hajime had scanned Konoha first with his psychic senses. It wasn't chakra sensing, it was psychic power. A layer beneath reality, where intentions echoed and thought left imprints. There, just outside the walls, nestled into the bark of a gnarled tree, was something watching.

Something wrong.

The creature tried to remain hidden, phasing into the tree's trunk like a ghost. But Hajime had seen daemons that screamed through dimensions. A hiding spot meant nothing.

He walked into the forest alone.

He stopped before the ancient tree. Then raised his arm, fingers curled like a claw, and drove it straight into the bark. His arm pierced through without resistance.

The tree shuddered.

Then something screamed.

A pale, root-veined body was pulled out in one motion, White Zetsu, its masklike face twisted in surprise. It writhed, but Hajime had already reached into its soul with his mind.

No words.

No mercy.

Just erasure.

The creature's soul shattered under the weight of Hajime's will. Its body remained, blank, mindless, but alive.

"Perfect," he murmured.

Back in his lab, he began the process.

He extracted the purest cellular samples from the Zetsu's tissue, those closest to the original Hashirama strain. He bathed them in a nutrient solution infused with Yang chakra and psychic resonance. Then began to stimulate their growth, cloning them carefully, layer by layer.

But it wasn't enough.

Organic coils alone would never reach the resilience of those used by the Imperium.

So he forged an alloy.

At a side workbench, Hajime melted down chakra metal, rare, resilient, responsive to intent. He purified it, filtered its spiritual resonance with psychic flame, then pulled filaments thinner than hair from it using telekinesis.

The result?

A hybrid fiber: Chakra-reactive tendon strands, braided from White Zetsu cells and chakra metal. They gleamed faintly with silver-blue light, alive with potential energy.

He worked in silence, his movements precise.

Scalpels guided by telekinesis. Tubes woven through with psychic heat. Enzyme baths controlled by microscopic chakra pulses.

And all the while… his mind remembered.

He remembered standing shoulder to shoulder with Grey Knights before the gates of a daemon world. He remembered repairing armor while orbital fire scorched the sky. He remembered hearing the last words of brothers who never blinked, even as their flesh melted away from corruption they refused to bow to.

He remembered what it meant to be unbroken.

To be Grey.

But now, something more.

Not just Astartes. Not just Apothecary.

When the Sinew Coils finished forming, helixes of gleaming sinew, charged with chakra and forged in psychic purity, Hajime stood over them and whispered:

"I am the first."

He lifted one of the completed implants. It pulsed faintly in his hand, like a newborn heart.

"I will become what they feared to make."

He placed the organ into the integration chamber, already preparing his body for the next implantation.

"I am the first Primaris of the Grey."

The lab lights dimmed as he began the process.

And far above him, Konoha carried on.

End of Chapter 50 – I am the first Primaris of the Grey