> For the complete documentation index, see [llms.txt](https://whitepaper.winnfthero.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whitepaper.winnfthero.io/3.-nfts/3.1-hero-nfts.md).
# 3.1 Hero NFTs
Each hero in WIN NFT HERO has his or her own position. Both tanks and attackers are indispensable in winning battles. Heroes of the same class or gene will form bonds, which will substantially boost the squad's performance in battles. Hero NFTs consist of five parts: quality, attribute, class, skill, and bond.
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