Ways to earn Coins
Coins are earned at the end of matches. The outcome of the match and the mode played decides the number of coins the player is going to receive.
Regardless of the mode, every loss rewards the player with 5 . The reward for winning a casual match is 15 and a ranked match is 20 . For the missions, a level rewards with 15 except for the boss battles, which reward 100 .
Coins disappear completely once all the basic cards are earned.
Ways to spend Coins
The only place where coins can be spent is at the store, and the only pack which can be bought with those is the Basic Pack, which rewards with cards of the Basic set.
Once the player has four copies of each basic card, a message will appear telling that all of the basic cards have been unlocked, and coins will completely disappear from the game, even the counter goes away.