Ning Chen absorbed a vast amount of Nirvana essence, yet still failed to trigger any spiritual energy tide. This not only shocked and bewildered the other disciples, but also left Tutor Cheng Yu, who had departed but continued keeping a close watch on the Nirvana Pool, in a state of lingering shock and uncertainty.
"If this keeps up, the Nirvana essence in this pool is going to be completely drained by him."
Tutor Cheng Yu frowned.
Chapter 580