Chapitre 628: Niya O'Brien's Cry For Help! (3)

Chu Zhou looked surprised.

Over the past few days, he had been using the Soul Stones in the Black Mountain Mystic Realm to strengthen his Soul Origin.

However, when his Soul Origin Enhancement reached 30 times, the Soul Stone lost its effect.

He had long known that the soul stone could not continuously increase his soul source.

The soul stone was only formed by fusing the soul power of the Netherworld Venerable with the stone after all. Even if it could strengthen his soul origin, there was still a limit.

It was obvious that the effect of the soul stone on him had already reached its limit.

However, he was satisfied.

His soul origin had increased by 30 times. This was already a shocking opportunity that other World Overlords could only dream of. What was there to be dissatisfied about?