Kurodokusei

"More than a blade. It is me. It is apart of me. I am the only one capable of wielding it."

- Toyotomi about Kurodokusei

 (黒毒性, Lit. "Black Toxic") is an ancient sword, currently wielded by Toyotomi Kageyoshi. Kurodokusei is hailed as one of the greatest swords in the history of swordsmanship. It is the ideal sword of all swordsmen, and has been pursued by many. Among these many men, was none other than shinobi legend, Orochimaru. Though, like many others, he failed. This blade can not be chosen by it's wielder, but instead chooses it's wielder. Samurai have sacrificed children, the elderly, and even those on the brink of death, in attempts to find a perfect wielder of the blade. All of it, was for nothing. Each sacrificed would die a pointless death. Even though they were aware of this, Many have tried to destroy the blade, but have failed on numerous occasions. It's quite simple. The blade can not be destroyed. Those that have tried to forcefully wield it and/or destroy it have all been inflicted by a deadly poison, which takes little time to kill it's targets. This poison is able to affect the entire immune system, completely intoxicating the entire body. As the poison makes contact with cells in the body, they shrivel up and die out. No organs are safe. The heart, the lungs, intestines, etc, will all perish once affected by this poison.