I have a problem here. In the guide, if you want to upgrade the wallet, you need to search turqoise or ruby stone in the waterfall and desset. I already search all of them, but it seems they're not spawning in my run. I even use mithril treasure chest, but they still not appear. Anybody have some solution for this?
Check the color of the indicator for the probability of a rare artifact appearing. It is located on the left under the main game screen. With each new victory, the indicator fills up and its color tends to red. And the closer it is to red, the higher the likelihood of a chest with a rare artifact appearing.
You can read about similar features of the game in small books in Agranor's library (next to Сeliсa's house).