In the Wizard Plane, land sales are generally permanent after the transaction.
Herag didn't do that; he sold the rights for use for five hundred or a thousand years, with prices varying by region.
For instance, the region Serlandir bought was ten million magic stones for five hundred years.
After five hundred years, Serlandir must choose to purchase the usage rights again; otherwise, Herag will reclaim them.
The price actually seems quite cheap. Within five hundred years, one should be able to earn back those ten million magic stones.
But the issue is, Herag never said the renewal fee would also be five million magic stones; it might even increase.
Moreover, after these wizard organizations buy the land usage rights, the towns they build and the natural environments they modify belong to the land, and they cannot take them away.
This means if Serlandir doesn't renew after five hundred years, Herag not only retains the land but also the modified results.
