Seeing their master advance by an entire rank in roughly a day—having already reached the sixth layer of the Void Refining stage—the spirit pets were instantly gripped by a surge of urgency.
The Phantom Spirit Fox, in particular, used up all the spirit crystals inside the space. They wouldn't be of any use once they entered the Divine Illusion Realm anyway, so it used some for cultivation and reserved the rest to keep the space operational. The spiritual Qi within the space was more than enough to help them level up.
Thanks to the Holy Light of Heaven and Earth, Song Nianchu had accumulated a massive store of energy. This energy would accelerate her progress during her breakthroughs. Once this energy was exhausted, however, her rapid advancement would slow down. Song Nianchu intended to strike while the iron was hot and make full use of this energy.
Chapter 596