Black Donkey finally spat the truth. He did not possess any treasure-seeking abilities but, instead, had a strong sense for sensing powerful creatures.
In the Pingtian Mountain Range, he was able to get so many Spirit Herbs because he first found the Demon Beast guarding them and then swindled them away. This meant that Zhou Heng had been eating dirty items for three whole months!
Demon Beasts were easy to deceive, and people were easy to trick. Zhu Zhihe and his group had treated Black Donkey as if it were a Divine Donkey sent from heaven, and they were almost tricked out of their pants. This showed that Black Donkey was indeed capable. If he hadn't met Zhou Heng first, who saw through his nature, even Zhou Heng might have been tricked.
After all, a talking donkey was truly shocking, and it was impossible not to treat it as a celestial creature.