After all, between swordsmen—especially swordsmen who had reached Yuu's level—only a true life-or-death battle could reveal who was stronger and who was weaker.
The way of the sword had always been a path of slaughter!
Only life-or-death combat could bring out the sword's greatest power!
As for Haki, Yuu's Observation Haki could now foresee six seconds into the future!
That was a terrifying number! In a battle between experts, a single second was enough to decide victory or defeat.
Six seconds? That was enough for Yuu to launch dozens of lethal attacks!
Even Katakuri from the "Pirate" world was now inferior to Yuu in terms of Observation Haki!
It was the undisputed strongest Observation Haki!
And Armament Haki, the Haki that could boost one's strength the most, had already broken through from outstanding to the ultimate level!
Ultimate-level Armament Haki! Even in the "Pirate" world, only a handful of people could reach it!
One of its representative figures was the strongest Marine known as Iron Fist Garp!
In the monster-infested "Pirate" world, he had earned the title of strongest Marine with nothing but his pair of iron fists and Armament Haki. Ultimate-level Armament Haki was naturally terrifying beyond belief.
Just as ultimate-level Observation Haki possessed the special effect of foreseeing the future.
Ultimate-level Armament Haki had its own special effects, aside from its terrifying boost to strength!
That was, one's strength would not decline with age! One would remain forever at one's peak!
And it granted an incredibly terrifying recovery ability.
Haki was like chakra. Once it was completely exhausted in a short period of time, it needed time to recover.
Take Luffy's Fourth Gear. After using it, because he had consumed too much Haki, he needed dozens of minutes to recover it.
While Haki was recovering, even powerful fighters