Board Thread:General Discussion/@comment-2601:6C4:205:9735:4018:22CD:11B0:4C70-20181230123640/@comment-35175794-20181230143037

If you are a newer player I would use them to open the second crafting stations in the merchant shops. One of the better deals in the store is 10 eyeglasses for 7 rubies. As far as in-app purchases go you can look into chest they offer by clicking on the chest to see what is inside to make a more informed decision.