Upgrade mechanics
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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 sends three cards identical by type, rarity, and level to the . 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.
The owner must have the abilities and skills to transition to more dangerous and upgrade a mine to the next level. Therefore, the mine must mine a certain amount of DME for a certain period of its operation for the upgrade.