> For the complete documentation index, see [llms.txt](https://docs.perplay.io/perplay-whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.perplay.io/perplay-whitepaper/game-fi/item/engine.md).

# Engine

Engines are items that can be obtained by disassembling NFTs owned by the user.\
Engine items cannot be traded in the in-app market.

<figure><img src="https://2438498047-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FflK4sG0vWxDViwDxgyKO%2Fuploads%2F9PU2GUevAPjRWcXcFIPf%2FEngine.png?alt=media&amp;token=88671cd7-bede-4df8-991b-d821444e9f96" alt=""><figcaption></figcaption></figure>

**\[Epic Grade NFT Engine Slot Equipment]**

Engines can be equipped to the engine slot of an epic-grade NFT to enhance its stats.\
There are four grades of engines corresponding to the grade of the disassembled NFT, and the stats for each grade are as follows:

<figure><img src="https://2438498047-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FflK4sG0vWxDViwDxgyKO%2Fuploads%2FC1GmVSxI3Xs7CKvvaNkE%2FEpicNFTengineslotEquipment.png?alt=media&amp;token=2419b526-670d-4a3a-a50c-726fae421d4a" alt=""><figcaption></figcaption></figure>

**\[Auxiliary Role for Evolving to Epic Grade NFT]**

Elite engines can play an auxiliary role when evolving elite-grade NFTs to obtain an epic-grade NFT.

1. Increased Plus Mark Probability\
   By using an elite engine when evolving four elite-grade NFTs to create an epic-grade NFT, the probability of obtaining a plus mark is increased.
2. Increase in Minimum Basic Stat Range\
   By using an elite engine when evolving four elite-grade NFTs to create an epic-grade NFT, the minimum value of the basic stats of the resulting NFT can be increased.

<figure><img src="https://2438498047-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FflK4sG0vWxDViwDxgyKO%2Fuploads%2FQsUebkZRsUCjuXAelvoW%2FEngine_Auxiliary%20Role.png?alt=media&amp;token=0dd489ca-fe19-49e1-b578-f52e8c0e5453" alt=""><figcaption></figcaption></figure>