Rock Crystal Dragon knew all too well.
It even rated them based on their attributes and shapes:
Thunderstrike Stone was purple, and chewing it made your mouth tingle. It didn't taste good, but it was perfect for decorating caves, so it was worth stockpiling.
Chewing Wind-Humming Crystal Gold made a breeze. It left you feeling light afterward, and it tasted good. Definitely worth stockpiling.
Red Sun Iron tasted great! Stockpile it!
Star Stone tasted great! Stockpile it!
Glittering Ore didn't taste good, but it looked beautiful, so it was worth stockpiling too.
Deep Sea Sunken Silver was good for grinding your teeth, so it was worth stockpiling.
Black Jade... Stockpile it!
...In short, stockpile everything!
The stones were used up every so often, whether they were eaten or taken away.
They needed to bring in another batch.
The money for buying stones was all earned by Rock Crystal Dragon itself, by selling its body... Specifically, it made money working in the Beast Fighting Zone.
It had stopped working there now, though.
The Milk Tea Shop was just too profitable, bringing in tens of thousands of Gold Soul Coins a month.
At first, Rock Crystal Dragon earned ten Gold Soul Coins a day. Later, that became fifty, then a hundred... and eventually more than five hundred.
It wasn't earning money from the academy.
It was famous and powerful, knew how to pull its punches, and made an excellent sparring partner.
The senior students all wanted to train with it.
They competed to get a chance.
Rock Crystal Dragon couldn't spar with them all day, so it discussed things with Lu Ran and decided to set up a bidding system.
Whoever offered the highest price got it as a sparring partner. When it showed up and how many matches it did in