"mundane becomes extraordinary" turns a random white item in your inventory to a purple one. Best to have one white item of your choice at such an occasion so you're sure which purple you'll get.
I have a little suggestion if you're planning to update the game.
When pressing "Return" in the shop menu, could you make a confirm button? It happend to me that I accidently clicked it thus I had far too many items in my inventory which i had to throw away. Nothing major but it can be a little annoying.
Great game, I dislike the fact that your success depends so mutch on the classes you take. 2 Clerics and 2 Rangers can get you really far. While other combinations using various classes will force you to restart when getting in the higher levels because it'll get impossible.
Still a great game, some great improvements and I like the new passive skills. Fantastic tactical RPG.