Ruby of Iuchiban

The Ruby of Iuchiban was a tainted gaijin magical stone of egg-size from the Burning Sands that trapped spirits inside it.

Iuchiban
In 656 the Iuchiban's spirit form discovered it, and it was lost in 750 in the Battle of Stolen Graves, where Iuchiban was recaptured. It was believed a bloodspeaker swallowed it and escaped with the Ruby. It was seen again in the Mantis Invasion of the Phoenix lands in 1132.

Shahai
In 1165 the Ruby was in hands of Shahai. She showed it to Iuchiban inside the Tomb of Iuchiban. Iuchiban betrayed Shahai letting Yajinden to enter the Ruby, fouling Shahai who supposed the soul was Iuchiban. It was followed with the Third Raise of Iuchiban.

Fate of the Ruby
The Ruby was recovered from the Shadowlands by Moto Akikazu at the behest of the Shi-Tien Yen-Wang, the Lords of the Death. Moto Tsusung worked on the Ruby of Iuchiban, which he believed contained a pure Iuchi soul. Akikazu was able to release Iuchi Ietsuna from it in 1168. The Ruby disappeared after the event.

Abilities
The wielder of the Ruby could trap other souls indefinitely, being the corpse of the prey in a coma.