C599 The Nineheaven Spirit Gathering Array the Thousandfold Amplification!!(2)

As Su Yu contemplated the exhilaration in his mind, he involuntarily inhaled sharply.

A tenfold increase in energy concentration!

It's worth noting that even a mid-grade cave's energy concentration is merely two to three times that of his own current cave.

Yet, the Nine-heaven Spirit Gathering Array could amplify it by ten times!

Though the cost was steep, High Grade Great Dao Stones..