Clan chest + Different Chest Opening part 5 – Clash Royale
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.
Once you have unlocked a Card, you will never have to unlock it again. Even if you donate your only copy of an unlocked card, you get to use the Card permanently.
Additional cards obtained will fill up an upgrade meter. Once the meter is full, you can upgrade the card with Gold. Upgrading the card occurs instantly.
Card levels in combat are displayed next to their health bar.
For cards, all health and damage stats 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.