The Entire game is based off luck. If you start with a bad card deck it's over and even if you get a good card deck it enemy will always have better cards than you. I am a level 5 and I'm going against level 30 people. The Plant campaign is Ridiculously Unbalanced as there is no way to beat a boss ( level 10 onwards)without a legendary card. Card packs should be more specific to the type of game style you like.( Example Plant pack for Plants and Zombie pack for Zombies NOT BOTH OF THEM COMBINED)