In Abyss, Bonarunerk learned a wonderful spell from a wandering Alchemist.

Not stone into gold, nyerk, but Demon's Eye into platinum coin!

All that's needed to cast the spell is Kinah--the most magical substance of all. Got Demon's Eye?

Player: "Here's a Demon's Eye and 1,000 Kinah."

Only 1,000 Kinah makes a pretty poor spell....
5,000 Kinah...not bad, not bad, could be better with more, nyerk.
Good number, lucky number, makes a good spell. Lots of Kinah makes lots of coins!