The actual card battles are fine, everything else isn't. You have to cillect tokens and stuff to upgrade buildings in village so you can do things like upgrade cards, buy potions and items, etc. You have to uograde the buildings to earn points to unlock new cards. You cant put the new cards in your deck, they're only available as dungeon/stage rewards. So your deck resets to the basic starter deck for every dungeon. Then your forced to repeat stages to get enough stuff to upgrade buildings, starting with the second stage, because the mobs in the third stage start out so strong you can't beat them😂 it's definitely a pay to stronger game.