Be it in battle or by opening chests, you will have plenty of opportunity to find and collect cards to keep your troops strong!
Chests- Each of the three chests; Soldier, Knight and Lord, will have varying amounts of all types of cards you can use to upgrade your Heroes and Towers. Remember that you can open a free Soldier Chest every 6 hours, and a free Knight Chest every 36 hours.
Levels- You can win cards by completing a level. Before selecting ‘Play’ button on a level you will be able to see the three/four potential card icons you can win from it. So, if you ever need a specific card you can hunt for it amongst your levels!