> For the complete documentation index, see [llms.txt](https://nbmofficialwiki.gitbook.io/nbm-shadow-depths/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://nbmofficialwiki.gitbook.io/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/iv-nbm-nfts/nft-assets/booster.md). # Booster Boosters are unique NFTs created by the NFT team meant to enhance mining operations' output when placed on it. Boosters can be placed on the mining operation on the boosters slots.

**Promostickers** were the first NFTs to be released at the very early stage of the game. They provide 1% yield bonus to operations.

Then **Cargo booster** template came in, offering 2% yield bonus to operations.

Later, with the Shadow Depths release, the team introduced three additional boosters (1%, 2% and 3%) automatically distributed to Season pass holders. Each season, those who purchased a Shadow Depths pass automatically receive a Shadow Depths booster at the end of the season given season. The template that each player receives is randomly determined: 50% chance for a 1% booster, 25% chance for a 2% booster, and 25% chance for a 3% booster.

Overview of the 3 Shadow Depths stickers randomly distributed at the end of each season to Shadow Depths pass holders.

The last series of compatible boosters are **patents** NFTs which can be obtain by playing [Alchemy](/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/viii-alchemy.md) or on secondary market. Each one of them grant 5% yield bonus, limited to one per mining operation.