Along with their roars, everything doubled, doubled, and doubled.
Two became four, four became eight, eight became sixteen, sixteen became thirty-two, thirty-two became sixty-four, and sixty-four became one hundred twenty-eight.
Their strength continued to increase, so that the immense pressure of their figure shook the space, causing fluctuations and errors in the material realm.
Infinity Critical.
This was the Balance Breaker, the strongest technique that Sato DxD had developed from his limited ability!
Frankly, the work of this technique was more or less similar to the "Boosted Gear," which was the advanced version of the "Twice Critical," as what he did was just to double his everything until it was impossible for him to double his everything anymore.
Unfortunately, for Issei, the user of the "Boosted Gear", instead of fully utilizing the ability of his Sacred Gear, he chose different abilities, trying to become Ddraig, the origin material of the materials used to create the Boosted Gear, and its original ability, rather than the boosting ability.
Yes, Ddraig, the Welsh Dragon, was powerful, as it's one of the Heavenly Dragons, the second-highest level of the dragon.
Yet, in the end, wasn't it dead?
If Ddraig could live till now, Sato wouldn't say much, but it died, and became the "Boosted Gear," so while Issei might be powerful, it was impossible for him to become the strongest even if he regained all the power of the original Ddraig.
On the other hand, the infinite double ability that came from the Boosted Gear was something that Sato thought of as the most powerful feature of this Longinus, a type of Sacred Gear that had the capability to slay gods and deities.
Still, while this technique could double his power infinitely, it didn't mean that he could become stronger for a long time. The stronger he was, the shorter his time to maintain this power.
Ten seconds.
This was a time that he could have used to maintain his overall strength, which had increased to 128 times stronger.
Yet, this wasn't enough, and to call the third and the fourth, they still needed to further increase everything further and beyond!
128 became 256, 256 became 512, and 512 became 1024.
1024 times stronger!
This was his limit, and he could also maintain this state for one second!
More than this, his body would burst, explode, and die!
Rather, after he used this technique and became 1024 times stronger, his body was already on the verge of breaking apart, and he knew that as soon as one second was over, he would be as good as passed out and lose his ability to wake up, at least for a few days.
In the past, he had tried it, but he wasn't as extreme as he is now.
Still, the effect was serious as he had to be on the bed for several days, and that time was like a hell, as he had no one to rely on, which made the situation became even more serious, and he had never wanted to experience the same things again, and that was why, he didn't use this technique, the Infinity Critical.
However, this time, he wasn't alone.
He had Sona and many, and more importantly, he also had Sato of Fairy Tail!
Yes, as the two of them worked together, Sato DxD strengthened himself, and Sato Fairy Tail healed himself.
As the two were in synch, they increased and healed everything.
His body might be breaking apart as it grew 1024 times stronger, but it also healed 1024 times faster.
The two forces collided.
One was destroyed, and the other was fixed.
As they had always been ordinary, everything was well-balanced, and neither could beat the other.
In that one second, they were in a state of equilibrium.
As their eyes met, they were filled with excitement.
One second.
One second, they were as good as invincible!
It might be a short time, no, one second should be impossible for one to do anything, yet for the two, it was enough!
As they gave their all, they saw two figures slowly form in the space where they met, becoming actual, a reality, and finally, the third and fourth figures emerged.
Yet, the two of them had no power to do anything, and they just lay there weakly, completely exhausted.
As for the third and the fourth Sato, while they were confused, they also understood everything since everything was automatically explained within their minds.
"Are you two okay?" 2x
The third and the fourth quickly asked, but Sato DxD and Sato Fairy Tail had no energy until later, when they had rested well enough.
"This space seems to have an effect to stop time?"
"We can use it to rest."
"But, will it work during the battle?"
"..." Everyone.
No one knew, but no one also wanted to bet.
Moreover, with their personality, instead of being in pain and forcing themselves to get stronger, they had to sacrifice something; it was better to grow stronger when everything was calm and at peace.
If they had to say, it was like how a student did their exam; instead of cramming everything in a single night, then being unable to even sleep, it was better to work hard early, slowly reading and learning, so during the exam, they had no need to be in a hurry and could pass it calmly.
Yes, instead of working hard to death, it was better to endure the pain slightly during the beginning, so that way, it would give a fruitful result when the time came.
Which was why they quickly summoned the third and the fourth, at this moment, when they had time to fix everything.
Still, the question was, which world did the third and the fourth come from?
"You are from the DxD?"
"You are also from Fairy Tail?"
"Yup." 2x
Sato DxD and Sato Fairy Tail nodded.
"What about you two?"
"Which world are you from?"
"Well..." 2x
The third and the fourth looked at each other for a while, seemingly hesitating.
"How about you first?"
"Okay." The third nodded and said, "I am from the world where the villain and the hero exist, you know which world, I come from, right?"
"My Hero Academia!" 3x
The third Sato came from the world of My Hero Academia, a world where 80% of humanity gained superpowers, which led to panic and chaos, and a world where a profession known as "heroes" existed to protect everyone from the villains, criminals, and all others that brought havoc and terror to society.
Still, while they wanted to ask more about the Third Sato, they knew that they needed to know more about the Fourth Sato.
"How about you, Fourth?"
"Well..." The fourth Sato looked at Sato DxD for a while and showed a helpless expression.
"I am from..."
"You are from...?" 3x
"Maken-ki."
"...." 3x