There was another important reason. The more Divine Soul Stars engraved, the greater the amount of Divine Soul Power needed when condensing the Primordial Spirit to break through the Fifth Tier—it would increase exponentially.
Previously, when the State Preceptor and Elder Peng broke through, the quantity they used wasn't even one third of Xu Jin's.
Dozens of breaths later, sweat was already visible on Xu Jin's forehead. The efficacy of the two Dragon Turtle Soul Refining Pills had been mostly consumed, yet he still hadn't broken through.
In the next instant, Xu Jin directly took out the Star Jade that had been sealed with half-formed Divine Soul Power from the Star Battle Divine Statue, which was originally prepared for Ning Yuchan's breakthrough.
But at this point, there was no time for such considerations. Xu Jin used it himself.
