Broken af. Sacrificing creatures while blocking still stops the attacker.. what?? If you want to change you're mind about which creature to select for a spell and you try to go back it will just cancel the spell. I can't tell you how many times I have tried looking at my mana or a creature and tapped them and am unable to untap them. Rewards and penalties not happening when I play cards, bugs galore. Not a lot of fun tbh, go back to in person cards and don't pay into a bad app.