Cards are the core 'equipment' in Clash Royale, representing your troops, spells, and buildings. They come in four rarities: Common, Rare, Epic, and Legendary. You collect cards from Chests, the Shop, Clan requests, and Challenges. To upgrade a card, you need a certain number of duplicates and Gold. Focus on collecting and upgrading cards that fit your preferred deck archetypes to maximize your combat effectiveness.
