Here is Chapter 18 of your Naruto webnovel:
---
Rebirth of the Otsutsuki: Yash's Path to Godhood
Chapter 18: Lunar Duel – Blades, Blood, and Betrayal
---
Ruins of Ryūchi Cave – Under a Shattered Sky
The battlefield was scorched with ancient power. The stars above blinked dim, eclipsed by the dark aura radiating from Tsukiō Ōtsutsuki, whose feet hovered inches above the ground.
Opposite him, Yash stood firm—chakra roiling around him like a storm. At his side, Sarada and Hakari had drawn back, the sheer gravity of the fight forcing them to retreat behind protective barriers.
The Void Blade in Tsukiō's hand whispered death.
Its edge shimmered with moon-cracked time.
---
[System Alert – Phase I Battle Commencing]
> Tsukiō – Moonblood Heir
→ Void Blade: Nullifies chakra-based defense
→ Moon Style: Time Severance, Lunar Illusion Art
Warning: Soul Displacement Signature Detected
→ Tsukiō is bonded to Lunara's life force
Damage him recklessly, and she suffers.
---
Yash lunged.
Faster than light, the clash echoed across the valley. His palm struck Tsukiō's chest—only to be met with an expanding ripple of null-chakra, tearing a hole through the ground behind them.
Tsukiō's fist slammed into Yash's ribs, launching him into a cliff wall. Dust exploded, but Yash emerged instantly—blood on his lip, but smiling.
> "That all you've got, moon boy?"
---
From the sidelines, Lunara twitched.
Her silver hair danced in the lunar wind, but her eyes—those cold, unnatural orbs—flickered with confusion. Pain.
Yash noticed.
[System Ping – Emotional Fracture Detected]
> Lunara's Soul Stability: 72% → 59%
→ Reason: Conflict between inherited loyalty and buried emotion
→ Opportunity: Subversion Possible
> Suggestion: Speak during combat – target her humanity
---
Yash moved again.
Dodging strikes.
Throwing feints.
Bleeding light.
> "Lunara!" he shouted mid-fight. "You feel it, don't you? That emptiness every time he swings you like a weapon!"
She gasped slightly—fingers twitching.
Tsukiō snapped, glaring at her. "Do not listen to him. He is false. His bonds are filth—chained by lust."
Yash laughed, chakra igniting behind him like a white comet. "Better to be loved by fire than frozen by pride."
He landed a direct punch into Tsukiō's stomach—slamming the prince to the ground.
---
Tsukiō rose slowly, bleeding black stardust.
"Then I'll show you what purity looks like."
His blade howled. He pointed it at Lunara.
> "Obey, blade. Shatter his bonds."
Lunara's eyes widened. Her body moved—not by will, but by command. A moonlight spear formed in her hands, aimed at Yash's heart.
She trembled.
"Stop," she whispered.
"Kill him," Tsukiō hissed.
"I... don't want to."
The moon cracked.
---
[System Alert: Rebellion Triggered]
> Lunara's Soul Sync: 59% → 80%
→ Bond Transfer Possible
> Choice: Intervene and claim her now
Risk: May enrage Tsukiō and push him into Phase II – Eclipse Form
---
Yash stepped forward, reaching out his hand.
"Lunara. I don't want a weapon. I want you."
Her hand reached toward his.
Her body shook.
Tsukiō screamed.
"TRAITOR!"
His chakra exploded.
Eclipse Mode Activated.
The stars went out.
The battlefield went black.
Only two glows remained: Yash's divine eyes, and Lunara's tearful light.
---