NFT Upgrade System

Travel NFT Upgrade

When NFT reaches level 5, user can upgrade NFT Quality to a higher Quality by using 2 NFTs of the same Quality but losing 1 NFT. It retains the Attributes value of the base NFT.
Users can add The percentage of success Quality up their Travel NFTs by burning GAS
Quality
percentage of double
percentage of success
Common
20%
70%
Uncommon
15%
60%
Rare
10%
50%
Epic
5%
40%
Legendary
NA
NA
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