Three hundred million Spirit Stones—this is an astonishing number.
However, when stretched over a millennium, it doesn't seem so significant anymore.
It's merely three hundred thousand Spirit Stones per year.
If one were to extract Spirit Stones at all costs,
then it would even be possible to mine several million Spirit Stones annually.
But in a few years, or perhaps a decade, the Spirit Stone Mine could be completely depleted.
By then, there would no longer be a stable income of Spirit Stones.
The greatest advantage of a Spirit Stone Mine is its stability!
"Earning three hundred thousand Spirit Stones steadily each year is actually quite good, especially since this is just a small-scale Spirit Stone Mine."
"If it were a medium, large, or even super-large Spirit Stone Mine, the annual yield would undoubtedly be an astronomical figure."
