Homerun Clash: Legends Derby has Batter Cards, Equipment Cards, and Skill Cards.

To unlock new cards, players must acquire them through various methods such as Homerun Coin Rewards, purchase from the Shop, receive them from unlocking Chests, and more.
If you happen to acquire a duplicate, do not worry as duplicates can be used as upgrade material.
By upgrading cards, the result will be a much stronger card than before.