This page is about what cards are in general. To read more about the individual cards in Clash Royale, click here.
Cards are the only method of deploying troops, spells, and buildings onto the battlefield. Deploying cards costs Elixir, which is gradually gained during battle. Cards can be obtained through buying them with Gold in the Shop or finding them in assorted Chests. Duplicate cards obtained will fill up an upgrade meter. Once the meter is full, you can upgrade the card with Gold. All health and damage statistics are increased by roughly 10% per level. Cards that are able to spawn troops, such as the Goblin Hut and Witch, will have their spawned troop level increased by 1 per level.
Types of Cards
There are three main types of cards: troops, spells, and buildings. Generally, spells are temporary and can be cast anywhere in the battlefield, while buildings (which are stationary), troops (which can move) can only be spawned on your territory. There are also 4 card rarities: Common (signified by grey or pale blue), Rare (signified by orange), Epic (signified by purple) and Legendary (signified by a rainbow). Each rarity has a different number of levels.
On March 13, 2017, the March 2017 Update added four new cards over time. They are Bandit, Heal, Night Witch, and Bats. After this set of cards was announced, Supercell announced that it would no longer follow the two-week release scheme that was in place from September 2016.
You are guaranteed to get 1 Epic during the tutorial.
The chest you get is based on the arena in which you battle in, not your current one. You will always fight in the higher arena (Example: if a player from Arena 5 is matched with a player from Arena 4, then they will fight in Spell Valley, which is Arena 5). This means that you can get cards from an Arena that you have not reached yet.
Epics can only be requested once every Sunday.
Legendary Cards cannot be donated or requested.
If your card has reached the max level, you can hold additional cards (100 for Commons, 10 for Rares, 5 for Epics and 1 for Legendary) for donations. When even this meter is maxed out, each card received will give you a certain amount of Gold. This also holds true if you have enough cards to upgrade to the max level but haven't upgraded it yet. For example, when the upgrade meter of a level 13 Common card reaches "5000/5000", each additional card will be converted to 5 Gold.
^ The Total count of cards does not count the Unlock cards as they can be used to upgrade a card to Level 2. You can even donate the only card to unlock it and still be able to use the card at level 1.