> 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/active-card/albums.md).

# Albums

In NFT Battle Miners, active cards can be separated into different categories depending on their purpose. These categories are called Albums. Currently, there are four albums:

* **Promo Album: c**ontains cards from the [Promo Pack](/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/iv-nbm-nfts/packs/promo-pack.md), which were introduced to initially fund the development of the game. Currently, those cards allow players to unlock the INVESTOR achievement (see the [Achievements](/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/xi-achievements-and-ranks/achievements.md) section).
* **Mining Album:** contains cards from [Mining Pack](/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/iv-nbm-nfts/packs/mining-pack.md) bearing good attributes for resource extraction. 
* **War Album:** contains cards From [War Pack](/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/iv-nbm-nfts/packs/war-pack.md) that bear good attributes for combat. 
* **Equipment Album:** contains cards from [Equipement Pack](/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/iv-nbm-nfts/packs/equipment-pack.md) that are used for cave exploration and to play [Shadow Depths](/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/vii-shadow-depths.md).
* **Extractors Album**: contains powerful NFTs from [Starter Pack ](/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/iv-nbm-nfts/packs/starter-pack.md)design to boost resource extraction.

Albums were introduced to group cards into different categories to better facilitate filtering when looking for particular units.

{% hint style="info" %}
While each of theses albums are design to be useful in a particular NBM area, they all share the same base statistics (RESM, NFTM, Energy, Power...) which make them all usable on mining operations (see [Arcadian Mining](/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/v-arcadian-mining.md)).
{% endhint %}