The top quality leaves are wildly growing in the neighborhood of the peak of a mountain range with an elevation of 8000 meters in the northern Urquhart Holy Empire.
The price of these were far higher than silver of the same weight.
Since you can’t collect the leaves more than three times a year in the harsh environment, their price ends up becoming high no matter what. Even going to pick them is a matter of life and death.
And then, the next most valuable yerbal maté trees are growing in these primeval forests and such.
Although the leaves are of good quality, they end up being eaten by wild animals since they taste good making them difficult to be obtained.