Princess of Pupppets

The Shirogane clan lived on the border of the Land of Wind. They were a small clan with no particularly skilled ninja. Trying to find a source of power to compensate for that, they created puppet walkers. Wielding an army, they survived the Shinobi Wars. But a dark secret was exposed: to develop the puppet walkers, they abducted humans and experimented on them. The puppet walkers were outlawed, causing the clan start a rebellion against the Five Great Nations and being annihilated. They were the developers of the master puppet, the ultimate puppet walker who have power to destroy nations. But an unexpected event happened: it had its own will. And fearing its immense power, and the prospect that the puppet might one day rebel against its creators, the Shirogane sealed the Master Puppet away into the five Spirit Orbs. The Master Puppet was about to be revived during the rebellion, but the clan was squashed before they could do so. The last survivors hid the Spirit Orbs on the Five Great Nations swearing revenge, and disappeared.