It's not stronger than Shusui, but requires a strong user to wield it.
It's a sort of Gravity Chamber training for Haki. Kept forcing Zoro to exert large amounts uncontrollably while using it, until he got to the point where he could hold control over that much of his aura.
It's a sort of Gravity Chamber training for Haki. Kept forcing Zoro to exert large amounts uncontrollably while using it, until he got to the point where he could hold control over that much of his aura.
Just my opinion though. It seems balanced.