The Wandering Merchant's treasure hunt.
This continues not only in the Ashen Mountain of the Demon Realm but also in the Garbage Mountain of the Human Realm.

[There are plenty of items hidden in the Garbage Mountain! I’ll buy anything valuable, so pick everything up. No, pick up everything!]

With the cheerful shout, the Garbage Mountain strategy began.
The basic strategy was to repeatedly collect and sell a few valuable items from Garbage Mountain’s first zone.

[A glass jar full of sparkling sand]

An item that was completely useless by human standards,
just shiny trash, a worthless …