Dont buy gems!
I have purchased gems twice in this game. The first time they billed me twice( they didnt refund my money or give me the value for the gems) the second time I have not received the gems and again they were quick enough to charge them though. Also their customer support is slow to respond( if they are going to respond at all)
Adam Vuorela about
Elemental Kingdoms (CCG), v1.6.3