Talk:Hidden Powers/@comment-116.49.39.133-20140720015729/@comment-24776460-20140720031311

If you already have decent spirits then I'd say Magical Ether bottles are worh 5 crystals (1 invoke) and Ether Bottles are worth 2~3 crystals. It depends on what spirits you have and if any of their hippos are worth unlocking. If you don't have a good mono deck for each element then crystal invokes would be worth more than ethers since you obviously need a good base before you start hippos.

For event spirit copies it all depends on how good that event spirit is and if their hippos are worth unlocking. I usully refrain from spending crystals since i'm a non-iap player so they are very limited for me.