Spirit Beast

Origin
The Spirit Beast was Zukia Tojiro's first creation and his most powerful. From it's power he created the other nine Tailed Beasts. When Zukia founded Kagegakure, the Spirit Beast rebelled by using it's power to scatter the other Tailed Beasts. It then fled to Yamigakure. It is discovered by a Yamigakure ninja who controls it and they attack Zukia. Zukia is weakened by this and uses his last bit of chakra to seal the beast in a deep cave under Kagegakure. Zukia then split the Spirit Beast's soul into five fragments, sealed them into shrines around the ninja world and then made the cavern cave in. It is said only a descendant of the ninja that challenged Zukia, can awaken the Spirit Beast and control it again.

Abilities

 * Absorb any evil soul thus increasing it's power.
 * Control anyone with any trace of evil or malice in their hearts.
 * Absorb the Tailed Beasts.

Summoners

 * Zukia Tojiro (he cannot anymore)
 * unknown ninja from Yamigakure
 * Gensho