Uchiha Yu’s Surprise

But even so, the Demon Slayer Blade was still a top-class weapon. Besides that weapon, Meikyō's other major gain in the Demon Slayer World had been Breathing Techniques. When he had first entered the Demon Slayer World, Meikyō's strength had barely reached the passing standard for a Jonin. However, his weakness was that his abilities were not comprehensive enough. At the very least, unlike other Jonin, he had not mastered two or more Chakra nature transformations.