Every big sect had some powerful celestial devices, which were usually passed down from generation to generation. Each sect would give these celestial devices to the sect's Grand elders to use. When they were not in use, the Grand elders would also nourish these celestial devices. The more they were nourished, the more powerful the celestial devices became. Therefore, after many generations of nourishment, the celestial devices were very powerful. These magic tools were the sect's signature magic tools.