Food and Gold are basic resources that you will need in order to develop your Kingdom and improve your Heroes. You can collect these at your Farms and Gold Mines and as rewards for completing certain quests and winning battles.
Gems are the games universal currency. Gems allow players to purchase in-game resources, Heroes, skip timers, etc. There are a lot of ways to get Gems for free, such as:
- Daily missions
- Daily login bonuses
- Raid chests
- Gem Mine
You will also need Power Stones to rank up your Heroes and improve their Talismans. Power stones are extracted from your Kingdom's Power Stone Mines.