Chu Mo had considered before, telling his master about this matter, and the two of them working together. But in the end, he gave up on that idea.
Leaving aside whether the Demon Lord would believe his words, or whether he would explain things even if he did believe. But the quantity of medicinal herbs required was something that a person or two simply could not assemble! Was the Demon Lord, a peerless expert, supposed to go and loot and plunder here and there?
And further, how is he supposed to get those herbs? Go and dig up the mountains, one plant at a time? Being a peerless expert doesn't mean they are knowledgable about herbs!
Chu Mo now knew, the master is not from this world. Thus, it is not an overstatement to say that in Great Xia, if you want to find something, the Demon Lord is definitely not as knowledgeable as Chu Mo!
As a disciple, you should help share the master's burdens.