Coins are currently, used to level up your commanders faster as well as to purchase items from the Guild Bank such as Gear and Souls that have been donated by other members of the guild.
There are various methods of receiving Coins:
- Dismissing Commanders
- Completing Story mode levels and chapters
- Completing Event levels and chapters
- Daily Log-in bonus
- Winning Arena matches and maxing Arena Leagues
- Mastery completion