DxDanmachi: Voyager of Worlds Ability

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Mika wasn't surprised that Issei had awakened Ddraig.

While he hadn't faced the same trials as his original counterpart, Issei's training under Mika had been far more rigorous, tailored to his physical limits.

Therefore, his current strength far surpassed that of his original self. Awakening Ddraig wasn't unexpected.

"So, you've come to ask me about your new power?"

"Yes!" Issei replied earnestly.

Mika nodded. "That's a wise decision. uncontrolled power is a dangerous thing."

Issei agreed; this was precisely why he had sought Mika's guidance.

After all, Mika constantly emphasized the importance of mastering one's abilities.

"In that case, allow me to help you."

Issei beamed. He trusted Mika implicitly, both for his strength and his guidance during their training.

However, his smile faltered as he saw the expression on Mika's face—a familiar, predatory grin that always preceded a grueling training session.

"Mika—what are you…?" he stammered, switching to a more respectful tone.

"Hmm?" Snapping out of his thoughts, Mika noticed Issei's apprehension and quickly reassured him.

"Relax, Issei. I'm just—curious about your Boosted Gear. The thought of witnessing the legendary power of a Dragon is… exciting."

"Oh…" Issei breathed a sigh of relief. While Mika's training was effective, it was also incredibly demanding.

"That's good"

"Boosted Gear's power is immense. Our sparring match could cause quite a commotion. Perhaps we should ask Akeno to supervise," Mika suggested.

"Yes! Let's ask Akeno-senpai!" Issei was eager for Akeno's presence; he hoped she would prevent Mika from being too—thorough in his training.

After all, Mika had just expressed his desire to test Issei's power.

"Very well." Mika contacted Akeno while they headed outside, Issei and Asia trailing behind him.

….

A Magic circle glowed, and six figures materialized at the base of a mountain—the same mountain where Mika had trained Issei and Asia earlier, the location of the Gremory family's villa.

Akeno had chosen this location for their sparring match; its remote location and surrounding wilderness would minimize any potential collateral damage.

"It's a shame we can't use one of those disposable dimensions like in the Rating Game," Mika mused, looking at the mountain. He could unleash his full power in such a controlled environment.

However, in the human world, he had to exercise restraint.

"No! This is fine! More than fine!" Issei quickly interjected, understanding Mika's implications.

After all—he would be the one on the receiving end of Mika's attacks. He had no illusions about the outcome; Mika's power was deeply ingrained in his memory.

"Very well." Mika glanced at the anxious Issei, then shook his head, a subtle smile playing on his lips.

They began their ascent.

"This doesn't concern you, Yuuto. Why are you here?" Issei grumbled, not wanting anyone else to witness his inevitable defeat.

"I'm also curious about the legendary Boosted Gear," Yuuto replied with a grin.

"I came as soon as Akeno-senpai contacted me."

"Me too!" Koneko chimed in.

Issei's face fell. "Akeno-senpai, how could you?!"

Akeno giggled, clearly enjoying his misery. Even Mika couldn't help but chuckle inwardly.

That woman is truly devilish.

…

They soon reached the villa's training grounds.

"Alright, Issei, let's see your new power," Mika said.

"Yes!" Issei responded, his voice filled with a newfound determination. Since it was unavoidable, there was no point in delaying. He would face this challenge head-on.

"My new ability isn't a direct attack. It's more of a—support type," he explained, summoning Boosted Gear.

"Boost!"

"Boost!"

"Boost!" After several boosts, he turned to Mika.

"Here, Mika, experience it for yourself. I call it—Boost Gift." He extended his hand, and a surge of power flowed into Mika.

"Impressive." Mika nodded, feeling the enhancement. He was familiar with Boost Gift.

It allowed the user to transfer their amplified power to a comrade or a weapon, a valuable asset in team battles.

However, it wasn't the ability he was interested in.

"It's a powerful ability, Issei. It will make you an invaluable asset in team fights."

"But what I want to see is your other power, the true power of the Red Dragon Emperor. You know what I mean."

"Understood!" Issei looked at him, a determined glint in his eyes.

"Balance Breaker!"

....

"Argh!" Boosted Gear glowed brightly, and a surge of crimson aura erupted from Issei, enveloping him in fiery energy as a suit of armor materialized around him.

This was—Boosted Gear's Balance Breaker: Scale Mail.

In this state, the ten-second boost interval was removed, the amplification reaching the limits of his body's capacity instantly. Issei's power surged to its peak.

"How long can you maintain this form, Issei?"

"About thirty seconds."

"Only thirty seconds?" Mika's lips curved into a smile.

In the original story, Issei had only been able to maintain his Balance Breaker for ten seconds initially. Thirty seconds, while still short, was a significant improvement.

"Thirty seconds is enough." As soon as he finished speaking, his Magic Power erupted, enveloping him.

"Let's begin!" He vanished, reappearing instantly before Issei.

"So fast!" Issei quickly crossed his arms to defend.

But Mika's movements were unpredictable.

He ducked low, sweeping Issei's legs out from under him, then, with an upward knee strike, sent him flying into the air.

"That hurt!" Issei cried out inwardly, feeling a sharp pain in his lower back as he ascended.

Mika's sweep had completely disrupted his balance, and the knee strike had landed squarely in his weak spot, leaving him momentarily paralyzed.

But what worried him most was Mika, rapidly closing in. He knew that if he couldn't regain control of his body, he would be subjected to a brutal combo.

"I can't let this happen!"

"Argh!" Seeing Mika approaching, he channeled his Magic Power through his armor's thrusters, changing his trajectory mid-air and using the techniques Mika had taught him to regain control of his body.

"Now!"

"Argh!" He unleashed another burst of power, dodging Mika's attack and flying to the side.

"Impressive, Issei. You've improved," Mika said, pleased.

He wasn't here to beat up a punching bag. He wanted to experience the power of the Red Dragon Emperor.

Mika's Magic Power transformed into flames as his Devil wings turned into wings of fire. Fueled by the flames, he surged towards Issei, his speed reaching terrifying levels.

Issei knew he couldn't simply run.

He had witnessed Mika's battle against Riser.

Against an opponent like Mika, running was suicide. He turned, extending his hand towards Mika, and a compressed sphere of Magic Power formed in his palm.

"Take this!" He unleashed the attack, a blast of energy that expanded rapidly, covering nearly half the mountainside.

Mika's eyes lit up. He channeled his power into his right fist. The next moment, it was enveloped in a black aura.

"Try this!" With earth-shattering force, he punched the incoming blast, sending it flying back towards the mountains.

He had literally punched the energy blast away, like a baseball—using Armament Haki.

After acquiring Haki in the One Piece world, he had focused on developing Observation Haki to enhance his long-range sensory abilities.

Armament Haki—had remained largely undeveloped, not because it was weaker, but because Mika believed it held even greater potential, especially in worlds with diverse energy systems.

In the One Piece world, Armament Haki could bypass the defenses of Logia-type Devil Fruit users, who could transform their bodies into elements.

This suggested that it had the potential to interact with other energy systems as well. This was a unique advantage for someone like Mika, a traveler between worlds.

BOOM!

The deflected energy blast struck the mountains, exploding violently.

Mika swiftly closed the distance to Issei.

"Prepare yourself, Issei."

"Let's do this!" Knowing he couldn't escape, Issei decided to fight with everything he had for the remaining few seconds of his—Balance Breaker.

"Argh!" He roared, charging towards Mika and throwing a punch.

Mika grinned and met his attack head-on.

BOOM!

Their fists collided, sending shockwaves rippling outwards. The battle reached its climax.

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