Vaults are important and essential for your Heroes, as they greatly increase their abilities. Aim to have 4 Vaults for each of your Heroes. In order to further develop their power and add Gems to them, you must upgrade each Vault to the following levels:
- Level 10. (1 gem)
- Level 30. (2 gems)
- Level 60. (3 gems)
- Level 80. (maximum Vault level)
You will need a lot of Forging Kits to do this. Here’s how you can get more Forging Kits for free:
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