The currencies in monster wars are gems and soulstones. Training takes gems and upgrading takes soulstones. Here you can find a strategy to get loads of them.
Gems[]
Use them to:
- Upgrade Units
- Upgrade Crypt
- Upgrade Soul Meter
- Upgrade Initial Souls
Soulstones[]
Use them to:
- Upgrade Units
- Add Skully Archers to the Tower
- Hire additional Gremlin miners