A total of six Spirit Concentration Pills worth of power was basically concentrated within his spiritual source.

"One Spirit Concentration Pill is at least equivalent to a month of hard work. The Spectral Concubine's fortune has indeed saved me a great deal of time.

"Four more pills remaining...."

Wu Yu estimated that if he finished cultivating with all the remaining Spirit Concentration Pills and continued to strengthen himself, the Chest Meridian's spiritual source would be stabilized. He would finally be officially on the dao path, and would be able to use spiritual power.

Presently, after consuming the medicinal power of six Spirit Concentration Pills, his spiritual power was already three times stronger than before.

The Chest Meridian was like that as well. Normally, it would absorb spiritual qi from the world around him to replenish the spiritual source.

Used in battle, spiritual power would greatly augment Wu Yu's strength. As a result, he would be much stronger than the last time he clashed with Heavenly Immortal Hao Tian.

The only thing was that his spiritual source was not too stable, and unsuited for intense fights....