Sendai

 Sendai  - The Sandai Kitetsu is one of the Grade swords. Like all of its predecessor Kitetsu swords, this one is said to be cursed. It is one of Tenguyama Hitetsu's creations. Zoro picked the sword from a barrel of cheap katanas in a shop at Loguetown after sensing its quality; Tashigi later identifies the sword from a catalog. When the owner first saw it, he was not going to allow Zoro to buy it, telling him of the curse. Zoro liked the concept and decided to test his luck against the curse. He threw it into the air and held out his arm, willing to let it cut his arm off. Zoro's luck won and the blade circled neatly around his arm. The shop owner gave Zoro both Sandai Kitetsu and Yubashiri for his skill and luck.

Can be bought from the Sendai Seller for 500k Beli and 500 Gems and has a 1/2 chance to spawn every 30 mins in a random island. Will despawn after 10 mins or if anyone buys from him.

Sendai Z move - Sends out a big yellow slash that can pierce through enemies. This move has a high amount of damage and it has a big AOE.

Senda X move - Creates a spiral of spinning slashes that damage the enemy. This has a high amount of damage and it has a big AOE.