Just a little, hard to make it-into-the game suggestion here!
What if there were fiary mines?
They would be super-duper-rare and they would have ben made out of fiary blocks, could have new ores like Fiary Gem?
You would go there by crafting a Fiary portal with 5 gizmos, 10 crushed artifacts, 5 Fiary in a Jar, and 5 stainless steel blocks. You would power it with 10 Fiary in a Jar to enter, and to leave, nothing special, jut walk out of the realm.
Fiary Gem could be used in giving the shrink wand a recepie, OR could be sold just like crops. What do you think? Be honest about it!