When he first entered the heavenly mystery realm, Chen Xiaobei estimated that there was a six star Holy Emperor-level Holy Meridian in the medium.
Chen Xiaobei had only used up one peak five-star divine Emperor's Holy Meridian and a few dozen low-level Holy meridians.
To Chen Xiaobei, this was a huge gain, but it was not enough to exhaust all the energy in the medium.
The thousand eyed Sacred Emperor had mentioned before that the heavenly Dao could spy on this space at any time.
With the nature of the heavenly axiom, it would make a big promise on the surface and make the disciples do their best to complete high-level missions. However, when the disciples really entered this Mystic realm, the heavenly axiom would not let the disciples consume resources as they pleased.
In other words, when the wielder of the will noticed that the resources in the space were being consumed too quickly, not only could he spy on them, but he could also intervene.