How to Upgrade Cards in Sonic Blitz

To upgrade cards in Sonic Blitz, you need to collect cards, Gold, and Star Coins. You can collect resources from Missions, Events, Gifts, and more. When you have enough resources, you can level up a card by spending gold and Star Coins.

Leveling up a card will move you forward in the card's level progress bar. There, you can view the reward you will obtain when reaching higher levels. Rewards consist of Rings, increasing the card's stars, and card packs. Upgrading a card to a higher star will sometimes give it better stats or a new ability.