What is this?

The Soul Crystal Box currently can't be used in the Korean version, but it seems usable in foreign versions. It was possible to breed dragons with Soul Crystals in the Korean version too, but it hasn't been possible for at least half a year. The app might get updated someday, but no one outside of the staff knows for sure.. You could just keep it, connect with a foreign IP using a VPN, or sell it.

Ah.. Thank you.

I sold all of these already...

I guess I should just sell all of those too. I was curious what they were~!!