Swordsmanship of Light. It had higher attack power, accuracy rate and critical hit rate than the normal Weapons Mastery skill. It was the strongest mastery skill that removed a buff or even gave a debuff when consuming a ‘great demon’s sins’. The jade light around Yura’s sword symbolized the inherent magic power of a Demon Slayer and gave the ‘weakness’ debuff
demon slayer complete the forth class quest