# Construction Cards

Construction cards are the most powerful and the most scarce assets in NFT Battle Miners. They can be obtained by opening the following packs:

* [construction-pack](https://nbmofficialwiki.gitbook.io/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/iv-nbm-nfts/packs/construction-pack "mention")
* [dominator-station-pack](https://nbmofficialwiki.gitbook.io/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/iv-nbm-nfts/packs/dominator-station-pack "mention")

Each construction represents a gigantic facility that can be placed on a land to boost resource extraction. Construction cards boost the operation's production in different ways: they first improve the land fertility (boosting the RESM/NFTM values), they also provide an additional bonus percentage on the land production, and they greatly increase the number of units that can be placed on a land. 

However, each construction was designed to boost the production of one specific resource, and it is not possible to use a construction card to extract a resource not supported by the construction. For instance, the Mining Facility (designed to facilitate FUSIUM extraction) can only be placed on a land containing FUSIUM, and the land must extract FUSIUM for the operation to be valid.

**Construction cards don't have a maximal supply.**

Each Construction has a similar template containing key elements:

<figure><img src="https://2684424931-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FrquzxdBSgIxWQUoWlCwN%2Fuploads%2FOdaX3RItG58ZNjiQJvhV%2FU5.png?alt=media&#x26;token=a941f6f4-ac21-4af6-8df3-97498c230485" alt="" width="375"><figcaption><p>Overview of a construction card and its several attributes.</p></figcaption></figure>

<table><thead><tr><th width="116.33333333333331" align="center">Number</th><th width="131" align="center">Name</th><th align="center">Description</th></tr></thead><tbody><tr><td align="center">1</td><td align="center">Name</td><td align="center">Indicates the name of the construction.</td></tr><tr><td align="center">2</td><td align="center">LVL</td><td align="center">Level (LVL). Each construction bears a level between 1 and 5. Once a construction reaches level 5, it is possible to improve its rarity.</td></tr><tr><td align="center">3</td><td align="center">GRD</td><td align="center">Grade (GRD), also called 'Rarity': Each construction bears a rarity Common (C) and Ultimate (U). Better rarity means better construction.</td></tr><tr><td align="center">4</td><td align="center">RESM</td><td align="center">RESource Mining (RESM): This value, generally between 3 (bad) and 15 (excellent), indicates how effective the construction is when it comes to resource extraction.</td></tr><tr><td align="center">5</td><td align="center">SIZE</td><td align="center">Size: Determines how many units can be placed on the construction to extract resources. When placed on a land, each construction occupies 1 slot but adds a given number of extra slots equal to the construction size.</td></tr><tr><td align="center">6</td><td align="center">ICON</td><td align="center">Indicates the main resource that the construction contains. Regardless of its level/rarity, each construction can only support 1 resource.</td></tr><tr><td align="center">7</td><td align="center">NFTM</td><td align="center">NFT Mining (NFTM): This value, generally between 3 (bad) and 15 (excellent), indicates how effective the construction is when it comes to NFT extraction.</td></tr><tr><td align="center">8</td><td align="center">BONUS</td><td align="center">Indicates how much the construction boosts the production of the land. This bonus is cumulative, meaning that if several constructions are placed on the same land, those bonuses add up.</td></tr></tbody></table>

Finally, construction cards belong to one of the following categories:

* [gen1](https://nbmofficialwiki.gitbook.io/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/iv-nbm-nfts/nft-assets/construction-cards/gen1 "mention")
* [gen2](https://nbmofficialwiki.gitbook.io/nbm-shadow-depths/overview/nft-battle-miners-official-wiki/iv-nbm-nfts/nft-assets/construction-cards/gen2 "mention")