In an age where gaming is moving towards a Play 2 Earn model, this game decided to go backwards instead... Unfortunately there is no way to progress in the campaign without paying good money... The game itself is actually pretty fun, but you can't farm anything, you're just stuck hoping that a 3 hours raid will yield at least 1 card upgrading material, which will probably not be the one you need or even nothing at all. Anyway, nothing's gonna change, but this just needed to be said...