Bloodswords

The Bloodswords are four katana forged by Asahina Yajinden in 508 using the Anvil of Despair for his master Iuchiban. Each weapon was of exceptional quality, and granted its wielder unnusual abilities as a powerful nemuranai. Each sword was also cursed, however, and its owner would eventually be obsessed by the trait for which each katana was named. The bloodswords were each gifted to a daimyo of a great clan with the intent that the weapon would destroy them, causing confusion in the Empire and aiding Iuchiban's attempt to dominate Rokugan.

The Bloodswords

 * Judgement given to Hida Tenburo
 * Passion given to Doji Tanaka
 * Revenge given to Akodo Meikuko
 * Ambition given to Bayushi Rikoji

(3E p. 13)