Arena
The battleground isn't the only place where you can upgrade your cards. You can also do it at the Arena — a special training facility in your city.
All players get access to the Arena after reaching Level 19. It considerably accelerates the upgrade of your cards. You can use the Arena to help weaker cards catch up with the others, or boost your favorites as much as possible!
On the entry levels you can train your cards only one by one. As you upgrade the building, new training slots will open. All in all, you can simultaneously train 3 cards at the Arena.
The cost and duration of one training session depends on the level of the building, the level of the card, and the amount of experience the card needs for a levelup.
Once the training session is over, the card gets the experience it needs for the upgrade, and the wins that increase its rank.
All players get access to the Arena after reaching Level 19. It considerably accelerates the upgrade of your cards. You can use the Arena to help weaker cards catch up with the others, or boost your favorites as much as possible!
On the entry levels you can train your cards only one by one. As you upgrade the building, new training slots will open. All in all, you can simultaneously train 3 cards at the Arena.
The cost and duration of one training session depends on the level of the building, the level of the card, and the amount of experience the card needs for a levelup.
Once the training session is over, the card gets the experience it needs for the upgrade, and the wins that increase its rank.