Chapter 964: Chapter 964 - 824: World’s Navel, Commencement of Advancement_2

The core of advancing to a Level three Mage is to open the Gate of Rules and let Spiritual Power produce a profound resonance with the Rules.

And the Plane Will - that hazy yet colossal collective consciousness slumbering in the depths of the Plane - is itself the source of all Rules within a Plane.

Advancing at the World's Navel means that at the moment the Mage pushes open the Gate of Rules, he is closer to the Plane Will than at any other place.