Economy
Inventory, Shop, and Bank help you manage the items and currencies you collect while playing. For a quick explanation of Gold, XP, Crystals, Emeralds, Keys, Hero Shards, Equipment, and Fragments, start with Resources.
Inventory
Inventory is useful when you want to check what you have collected. Pay special attention to new Equipment—an item sitting unused may be the upgrade your main team needs for the next Campaign battle.
Shop
Check free and ad-based offers regularly. Before making a paid purchase, make sure it provides something your current team needs.
Progression Tip
Check the Shop regularly for special deals, limited-time offers, and bonus packs. Promotions can give you more value and help strengthen your team faster.
Bank
Bank is where you can buy Crystals and Emeralds. Before purchasing a pack, check how much currency it gives and whether a First Purchase bonus is available.

How to Spend Resources
Early on, spend resources where they make the biggest difference: your main Heroes and the team you use in Campaign. Avoid upgrading everyone at once, and keep valuable currencies until you know what you need.