Shalltear - Brain Reference

The three-yard radius it covered was not so large, but he was aware of everything that happened within it. Put simply, the art raised his attack accuracy and evasion ability to the limit. Add to that Brain’s trained body, and the power he gained from this art was beyond compare.

Even if a thousand arrows were to rain down on him, he was confident he could pick out only the ones that would hit him and cut them down to emerge unscathed. Not only that, but he was able to move precisely enough to slice a grain of wheat, and only that grain of wheat, at a distance.

And then...

Chopping a vital point with one’s blade would kill a living thing, so pursuing that was all that mattered. Rather than being a jack-of-all-trades, Brain was instead an extreme specialist. He aimed to deliver a fatal blow even just one second faster than his opponent. It was from this intention that his second original martial art was born—Instant Strike.

His sword reached a speed that made it impossible to dodge, but his training didn’t stop there. His discipline from then on was extraordinary. He performed Instant Strike tens of thousands of times, no—probably millions of times, to the point where he developed art-specific calluses and his hand warped around the hilt
of his katana.

By pursuing Instant Strike to the extreme, another art was born. His speed was such that no blood remained on the blade at the end of his swing. He felt he had reached the realm of the gods and called it Divine Strike. It was impossible for his opponent to even perceive him unleash it.

By using those two arts, his guaranteed hit and godly speed—Domain and Divine Strike—the resulting blow was both impossible to dodge and a one-hit kill.

***

Volume 3, Chapter 2.2