One of the ninja swords used by ninjas who were good at sword art in the past.
Seeing it with a sharpened blade, it began to show its natural strength.
It must be equipped with the other ninja sword, Surudoi Kaze, in order to demonstrate its true ability, and it seems to resonate with the Great Hero's Boots.

When equipped with Surudoi Kaze:
For each 3 refine levels: ATK +15.
For each 5 refine levels: ATK +3%.

If total refine level of entire set at least +14:
Increases damage of Cross Slash by 30%.
Decreases Cross Slash skill cooldown by 2 seconds.

If total refine level of entire set at least +16:
Enables the use of Distorted Cresent, skill Level based on learned Level of Shadow Trampling.
Enables the use of Shadow Trampling, skill Level based on learned Level of Distorted Cresent.

If total refine level of entire set at least +18:
Increases physical damage against all property enemies by 15%.

If total refine level of entire set at least +20:
Increases damage of Cross Slash by 25%.

When equipped with Surudoi Kaze and Great Hero's Boots:
DEX +10, ATK +7%.