Game NFTs of structures and equipment can be upgraded. Either rarity or level of the card can be upgraded.
The game NFT in the DeepMine universe are divided according to:
- Type of use: structure, equipment, badge.
- Development level: 0-9 level inclusive
- Some types of NFT have rarity that is highlighted by their color:
- Gray (common)
- Green (uncommon)
- Blue (rare)
- Purple (epic)
- Gold (legendary)
A Citizen sends three cards identical by type, rarity, and level to the Government. In return, the citizen receives one NFT with a higher rarity.
The player must send a certain amount of DME, a card to be upgraded, the upgrade card and also fulfill additional conditions to upgrade the card by level. In return, the citizen receives a card of the same type and rarity, but a higher level.