Hero Promotion Stone is an item used for upgrade hero tier. Promotion stones can be obtained in many ways. Here are some ways to get it.
- Campaign
- Shop. You can buy in black market using gold and diamond.
- Operation. Go to opertaion and choose materials. You have 2 chance to enter
- Magic bean. Climb the tree and get the promotion stone
- Altar. Go to altar and Disassemble your unused hero
- Giftcode. Some code some codes provide promotion stone
- Achieved
- Event
- Etc