Emperor Shun's Blade

Emperor Shun's Blade (舜帝の剣 Shun-tei no Han) is a countermeasure against the Kasukamis' artificial souls. It has a double-edged blade as wide as its hilt, dark-colored on its side with a red diamond pattern (which glows when the blade's spell is prepared), decreasing towards and before the tip. As well as being wielded as a regular dagger, it is used for a neutralizing spell known as Spell of Emperor Shun's Blade (舜帝の剣の術 Shun-tei no Han no Jutsu). The dagger is prepared by placing it in the center of a seal, tip down, and performing an incantation. Once the preparations are complete, the dagger can neutralize the artificial souls used by the Kasukami family on touching their charm, separating them from their hosts, and is described as poison to the likes of the Taowu.