C1937 The Art of Two Realms

However, what Nirvana used was the Power of Heavenly Dao, and the Power of Heavenly Dao was the derivative of the initial power. It was separated by two layers, and it could no longer be considered the purest initial power, so the difference between the two was not too far off from that of the Power of Heavenly King, and it was still not something a mortal could resist