@Mewples
It specifically says master's rune skill was used on the sword. But they probably aren't anything special just words like "sharp", that only count as runes because of the skill.
@starburst98 but I think he just written his name on it to say it’s his sword or rather property.....it’s the legit translation what you can read but she thinks it’s more
@Mewples and what is his name? Names have meaning. So if his name means "overwhelming power" then anything he wrote that on would become overwhelmingly powerful.
@starburst98 Idk, I could read the kanji but .....I don’t want too, besides I could be wrong....
Though I do think you do see him writing on his sword in an earlier chapter