Cards are the only method of deploying troops, spells, and buildings onto the battlefield.
Spells can be cast anywhere in the battlefield, whilst buildings and troops must be spawned on your territory.
Deploying cards costs Elixir, gradually gained during battle.
Cards can be obtained by buying them with Gold or finding them in assorted Chests.
Chests can always contain cards from Arenas that you have already passed.
Unlocking a new arena adds new cards to the Chest rewards- none are taken out.
If you received Chests in a lower Arena, it will only contain cards from that arena and below, even if you advance to a higher arena.
Duplicate cards obtained will fill up an upgrade meter.
Once the meter is full, you can upgrade the card with Gold.
If your card reached the max level, you can hold additional cards (100 for Commons, 10 for Rares and 1 for Epic) for donations.
When even this meter is maxed out, each card recived will give you a certain amount of Gold.
For cards, all health and damage stats are increased by +10% per level.
There are 4 levels of rarity of cards: Common (signified by gray or pale blue), Rare (signified by orange), Epic (signified by purple) and Legendary (signified by a color rainbow).
