Upgrading cards is how you strengthen your deck and gain a competitive advantage in Career Mode. Higher-level cards increase your power and improve your chances of outscoring opponents.
Earn duplicates: Collect duplicate cards through Arenas, Bags, and rewards.
Spend Gold Coins: Use Gold Coins, the main progression currency, to complete the upgrade.
Unlock higher levels: Each upgrade boosts your card’s stats, making it more effective when played in battles.
The more you play, the more cards you earn — and the stronger your deck becomes. A well-upgraded set of cards is essential for climbing Arenas and progressing on Trophy Road.