Dont reset your data if you are playing
You wont get your used crystals back!
The game is fun though, but it would be useful if there was a function where the app would track your crystal purchases and you could reset your data so you could try and buy things again.
Also the limited number of summons means you cant collect everything in the game, so that was a bit of a letdown.
Llednaroth about
Dungeon and Girls