yea and the AI is complete bullsh\t, heroic is impossible to complete without training, basically you need luck to PRAY THAT UR TEAMMATE DOES SOMETHING USEFUL AND UR ENEMY DOES SOMETHING DUMB!
most of the cards are overpowered/underpowered in the sense that they are unbalanced and simply can't win against specific cards. This game is very unbalanced, and no matter how much they try to make it "fair," it simply can't be due to its heavy reliance on luck