Su Lun did not know how much the "Demon Blade Hyakumenzou Masamune" would enhance Mitsuko's capabilities, but it was definitely much stronger than when he, a novice in Sword Dao, had it in his possession.
After taming the Demon Blade, Mitsuko's entire demeanor had dramatically transformed, making her seem more ethereal and elusive. With her aura radiating outward, she resembled a divine being, like a Rakshasa Woman from hell, exuding a terrifying murderous aura that chilled onlookers to the bone.
The Famed Sword, once recognizing its master, would perfectly synchronize, and with this Demon Blade in hand, Mitsuko even outdid Su Lun with his Black Sickle, as if there was nothing in the world she couldn't cut through.
However, this wasn't without side effects.