The crowd couldn't understand how much the Beast Core could aid Tang Yan's cultivation, and they all thought he was being foolish.

Although Tang Yan wanted to trade, he had few High Spirit Pills left. Smiling, he cupped his hands toward everyone and said, "I'm running low on medicinal pills, so I can only exchange for fourth-rank Beast Cores. Anyone with a fourth-rank Beast Core can trade one for two of my High Spirit Pills."

Those with fourth-rank Beast Cores were all eager to trade with Tang Yan.

Over the course of a dozen days, everyone more or less encountered fourth-rank Spirit Beasts.