DXD: Naruto Recreation System

The grand hall was hushed as Lord Phenex stepped forward, his regal presence commanding the attention of all present. His golden hair and fiery aura shimmered, radiating an air of unshakable confidence.

"I will fight the next battle personally," Lord Phenex declared, his voice calm but firm. "I will not use my peerage. It would be disrespectful—to myself and to you, Itachi Uchiha."

The room fell silent at his words. For a Devil of Lord Phenex's status to fight alone was unprecedented, a testament to his pride and the weight of this challenge.

Itachi's crimson Sharingan glinted as he nodded slightly. "Very well. I accept."

---

Itachi's Calculations

As he prepared to move, Itachi's mind worked in overdrive. The reason he had sent Kisame earlier was to test the limits of two Ultimate-Class Devils. With Ruval and his Queen's abilities, he had expected Kisame to not burn lot of his energy, but the result was… disappointing.

"Kisame used about 40% of his reserves. If I had taken their place, my bloodline abilities would have ensured an easy win," Itachi thought, his Sharingan spinning faintly as he analyzed the data.

"But the problem isn't winning—it's sustainability. Chakra is my only limiting factor. My Sharingan, Amaterasu, and Tsukuyomi consume too much, and my reserves aren't infinite."

He opened the system interface discreetly, scanning his options. The idea of upgrading his chakra reserves tempted him, but the fight against Lord Phenex presented an unexpected opportunity.

"If Lord Phenex insists on fighting alone, why waste resources? With Kisame's system-linked chakra reserves at 25%, I can supplement my own during the fight. It's efficient and cost-effective."

The system's win-rate analysis confirmed his approach. Despite Lord Phenex's power and immortality, Itachi's win probability had only dropped by 1.3%.

Satisfied, he moved toward the portal. His reason for double-checking all this was simple: once the battle began, system rules prohibited purchases from the shop. Preparation was critical.

Soon both of them find them self in the battlefield with green grassland and mountains.

The battlefield shimmered with an intense heat as the duel began. Lord Phenex, standing regal and unyielding, ignited the air around him, the flames forming a golden aura. Itachi, his Sharingan spinning, studied his opponent with a calm yet calculating gaze.

"You're different from the others I've faced," Lord Phenex said, his tone laced with curiosity. "Your presence is Demonic and you eyes are just...."

"Flattery won't distract me," Itachi replied coldly.

Lord Phenex smirked. "Good. Show me your resolve."

Without hesitation, Lord Phenex raised his hand, summoning a massive crimson magic circle above him. "Flames of the Eternal Phoenix!"

A storm of fire erupted, descending upon Itachi like a tidal wave of destruction. The ground cracked and melted under its intensity.

Itachi countered swiftly, weaving hand seals with precise movements. "Fire Style: Great Fireball Jutsu!"

The two fire attacks clashed in mid-air, creating an explosion that sent shockwaves across the battlefield. Lava burst from the ground, and the air filled with smoke and ash.

Through the haze, Lord Phenex's voice carried. "Impressive. To match my flames is no small feat."

Lord Phenex conjured another magic circle, this time unleashing a rain of fiery spears that fell from the heavens like meteors. Itachi evaded gracefully, his Sharingan predicting the path of each spear.

"Fire Style: Phoenix Flower Jutsu!" Itachi retaliated, launching a barrage of smaller, concentrated fireballs that swirled toward his opponent.

Lord Phenex waved his hand, forming a golden flame barrier that absorbed the attack. "Your control over fire is remarkable. But fire alone won't defeat a Phoenix."

Itachi remained silent, his Sharingan spinning faster. He vanished from sight, reappearing behind Lord Phenex with kunai in hand.

Before he could strike, a burst of flame erupted from Lord Phenex, forcing Itachi to leap back. "You'll need more than speed to overcome me," Phenex said, his voice unwavering.

The battle intensified as both combatants began unleashing their more powerful techniques. Itachi attempted a powerful genjutsu, casting Lord Phenex into a nightmare of endless pain.

But Lord Phenex shattered the illusion with a burst of raw power, his flames roaring to life. "You think to trap a Phoenix in illusion? Clever, but futile."

Itachi's eyes narrowed. His genjutsu was ineffective, but his options were far from exhausted.

Itachi activated the Mangekyou Sharingan, blood dripping from his eyes as he unleashed Amaterasu. The black flames surged forward, consuming everything in their path.

The flames reached Lord Phenex, engulfing him in an instant. For a moment, it seemed the battle was over.

But then, from the center of the black flames, a massive pillar of golden fire erupted, dividing the sky and shaking the earth. The sound of a thousand screeching phoenixes echoed as the flames consumed the battlefield.

Lord Phenex emerged from the inferno, his body regenerating as his golden aura blazed brighter than ever. "Magnificent," he said, his tone filled with genuine appreciation. "These black flames of yours… They are worthy of respect. But you'll need far more to burn a Phoenix."

The massive pillar of fire remained, burning brightly and piercing the heavens. The audience watching through magical projections gasped at the sheer magnitude of lord Phenex's power.

Itachi stood his ground, his Sharingan studying the flames with unshaken focus. He spoke quietly, his voice barely audible over the roar of fire. "Even the brightest flame can be extinguished."

Phenex chuckled, his voice filled with both pride and excitement. "Then extinguish me, Uchiha! Show me the depth of your power!"

As the flames continued to rage, Itachi began weaving hand seals again, his chakra flaring with renewed intensity. The clash was far from over, and both warriors knew this was only the beginning.