the akasuki members called Gaara the "One Tail". There are nine Akatsuki members. That must mean that there are nine powers of human sacrifice, can't remeber the japanese word. Naruto has the "Nine Tails" in him, therefore there must be a two-tailed demon inside a human, three-tailed, four-tailed, etc... And they wouldn't want one of their members to have an advantage over the others. as to why, they want their powers! tell me how you defeat nine super powered ninjas with demons inside of them.
Which character are you test by Naruto - Kun.com