Santoryu Ogi: Sanzen Sekai: Zoro holds two of his swords at an angle against each other and rotates them rapidly while running towards his opponent to create momentum; he then slices up the foe with full speed and power. This attack was first used to try to defeat Dracule Mihawk.
According to the name of this attack, this is the ultimate and strongest technique of the Santoryu. It was first used successfully against Oars after 429 chapters since its first appearance, where Zoro dealt three enormous slashes over Oars’ body with the technique.
It is seen again much earlier in the anime, when a hypnotized Roronoa Zoro used it against Monkey D. Luffy in the Ocean Dream filler arc.
Now after the time skip we can clearly see how much Zoro improved. Zoro delivers massive slashes to his opponent one after another. This technique called Santoryu Ogi: Ichidai Sanzen Daisen Sekai can be done airbone and is capable of cutting through a large amount of solid stone with ease. This was first used against Pica, slashing several times at his giant stone body to lure him out and defeat him with the final slash of the move. When Zoro used this technique he used Haki on his swords to make them more durable and the attack even stronger.
