For example, selling Spiritual Roots, some Lower Grade Spiritual Roots are unique to this region!
If planted elsewhere, they may suffer from acclimatization issues, requiring dozens of times the resources to create a suitable growth environment to cultivate them successfully.
So if you don't want to use the unique Spiritual Roots of your Three Royal Families, and want to cultivate a special Lower Grade Spiritual Root, you'll have to buy it from others!
As for Middle Grade Spiritual Roots, they are rarely circulated casually.
They are generally unavailable and only occasionally appear in auctions, often without matching Cultivation Techniques, making them less advantageous than Lower Grade Spiritual Roots with fitting Cultivation Techniques.
The locality of this world is very strong, not just for Spiritual Roots, but for some Magical Artifacts as well.
