This is a beta test of upgrading system! (Numbers and chances can be changed)

If you want to try to upgrade your NFT, you need to choose NFTs to use them for the upgrade. Also, you will need small amount of BPM to do so.

Be aware - if you fail your upgrade attempt, you will lose half of used NFTs. If your attempt is succeeded, then you will get NFT with better rarity, all used NFTs will be destroyed.