In the past I had EA'd all four of my cloud queens and I am 99.99% sure that it did cost me 4 uncommon stardust, so now i had saved up some more stardust I wanted to EA my cloud kings as well, but after the first one, I was unable to EA the 2nd. Then I realized it took my promo stardust instead of a rare stardust ....While it is just a PvE card, just like the cloud queen. So why does one require its normal rarity and the other promo? So I assume this is a bug, either they should bost cost promo dust or queens should cost uncommon and king rare.
If i had known this beforehand I would have never EA'd this..... 200p down the drain