Allowing an Incarnation to take away half of his power was a risk that Ancient Ancestor Qutai had taken.
Because the Incarnation's power was equal to the main body, the only differences were a few Magical Treasures and the status of Heaven's Authority's Extreme, so the Incarnation could awaken its self-awareness to sever itself from the main body at any time.
Although this Incarnation could not overthrow the original, its self-awareness would directly result in the main body losing that half of the power.
And this kind of loss was different from the one experienced when an Incarnation was refined and killed.
When an Incarnation was refined and killed, the lost power could still be recuperated after some time. But once this Incarnation awakened its self-awareness, the lost power could never be restored, no matter how much one tried to recuperate.
