章節 901: Chapter 501: Sweeping the Secret Realm_2

However, Ye Feng in the mystical realm was still not satisfied.

"This efficiency is still too slow!" Ye Feng frowned slightly.

150 crystal cores, even if exchanged, would only amount to 15000 Heavenly Yuan Points.

This might sound like a lot, if one were to exchange for cultivation resources; for instance, if exchanged for Spirit Element Pills, one could obtain about fifty, a definitely ample quantity.

But if one sought the counsel of those elders who had mastered the Supreme Rule, it would be somewhat insufficient.

After all, which of the elders wasn't extremely busy? Thus, consulting them would require at least 10,000 Heavenly Yuan Points as a base.

Moreover, the 10,000 Heavenly Yuan Points would only get half an hour of their time, and more comprehensive guidance would cost extra.

Concerning other rules; Ye Feng might not be aware, but he had tried to comprehend the Time Acceleration Rule and was very clear about how difficult this rule was to master.