# 3.5. Metaverse Gameplay
WinFi has prepared rich metaverse gameplay for sNFTs:
Guardian bonus
Players can choose one sNFT from their collection as their Guardian NFT. The Guardian NFT will uniquely represent the player's identity while they are playing games. After the launch of WinFi's virtual reality device, the Guardian NFT's role will be 3D-virtualized into the player's character in the metaverse.
The most direct effect of the Guardian NFT is to provide a bonus to the player's earnings while playing. The bonus coefficient is denoted as F, while the sNFT level is denoted as L. Therefore:
Mining Bonus
sNFTs can provide a bonus to a player's staking mining revenue. The higher the sNFT level, the more obvious the bonus effect on mining earnings. Similarly, we set the bonus coefficient as A and the NFT level as L. Therefore:
where r is defined the same as in the Guardian Bonus section (3.6), with the default value of 1 for common NFTs and 20 for rare NFTs.
Upgrade Synthesis
WinFi will launch multiple common NFTs with different designs, as well as several rare sNFTs with unique designs. Users can upgrade their sNFTs by consuming WFT, and the upgraded sNFTs will have higher computational power in the reward contract. The following table shows the amount of WFT required for upgrade and synthesis:
Common sNFT and rare sNFT require the same amount of WFT for upgrading, but the mining efficiency, bonus effects, and dividend amounts of rare NFTs are several times higher than those of common sNFT.
Multiple common NFTs can be combined to create a higher-level common sNFT or a rare sNFT.
