The hero will be reset to level 1 when you use the [Reset] function. You can consume diamonds to reset your heroes, and all resources spent on the upgrade will be refunded.

Steps to reset your heroes

1. Tap [Hero] on the bottom right corner.
2. Select the hero you intend to reset.
3. Tap [Reset] on the left side of the menu.
4. Check the cost and resource consumption, then tap [Reset].