Tips and Tricks
Each of the six areas is open right from the start, and each one of them is the exact same difficulty from level to level. Whenever you are stuck, bored or want new cards, you can simply go to another elemental’s dungeon any time that you want to.
Use the battle boosts. The cheapest one costs 100 coins, and will increase your defense by 50 percent, and should be good for most battles that result in close losses.
Fighting as many monsters as possible you'll gain experience points. Go back to old stages is a good option for that. Not only will you gain levels but your monsters will too, thus allowing them to become stronger.
To use more than two monsters in your party get to level 20, and you will be able to put three cards into your active party at the same time.
Get to level 40 and you will be able to use 4, at level 60 you can use 5, and at level 80 you can use six of them at the same time.