Board Thread:General Discussion/@comment-13237238-20130724132657/@comment-30811407-20131221095148

Hmm, I have several ideas, some involving the cardinal sins, but lets go with Nisemono.

Nisemono is a cloning Zanpakuto.

Shikai: Bankai:
 * In its Shikai, its command is Yagami. In its first attack, the sword copies its self into a hundred blades that can be commanded by the true blade to attack anything.
 * Yagami no Ame is the most potent in this because it rains down all one hundred swords in an instant on the target.
 * Still in Shikai is Genzo. Genzo replaces the hundred swords with ten clones of the master with a sword for each. These ten are significantly stronger than the swords, but they are just copies of the master and so are still easy to discern from the true Shinigami, but together the ten pose a serious threat.
 * Still just called "Nisemono", it at first appears to have no effect, until you are attacked by two exactly identical Shinigami with equal power and energy. Nisemono's bankai is manifesting into a physical form that is identical to its master's. It is capable of everything its master is as well as acting independently.
 * Both carry a sword, but only one is the actual Zanpakuto, and both have a body, but only one is the Shinigami.
 * Nisemono can do all the things its master can, from Shunpo to Kido and beyond, he has all his memories, experiences and instincts, and vice versa.

Nisemono is mirror of its Shinigami, its personality is exactly like its master, as such, it reflects this in battle; first by reflecting itself into multiple forms, then by reflecting its master in forms. It reaches its ultimate state when it finally mimics its master completely. This comes from the fact that Nisemone wishes to be like his master.

The Strength of Nisemono's Bankai is that its near impossible to discern which is the Shinigami and which is the Zanpakuto, as such taking advantage of the weakness below is especially difficult.

The Weakness of Nisemono is hard to overcome. Both the Zanpakuto in the true Shinigami's hand and the body of the copy are the true Nisemono and both must be hurt in order to truly harm the Bankai. If both can be broken simultaneously, then the Bankai will be defeated as well, however, because Nisemono attains a physical form identical to its master's it can be healed separate its master's own body.