> For the complete documentation index, see [llms.txt](https://lightpaper.crazydefenseheroes.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lightpaper.crazydefenseheroes.com/tower-utilities/unknown-device-nft-fusion.md).

# Unknown Device (NFT Fusion)

<figure><img src="/files/5o6MmEfhyaRCQRNqbcU7" alt=""><figcaption></figcaption></figure>

Starting from 9 Nov 2022, the TOWER Unknown Device is available on the [TOWER Token Website](https://www.crazydefenseheroes.com/fusion/game-assets/?utm_source=medium\&utm_medium=article\&utm_campaign=article_Fusion), allowing players to use TOWER Token to Fuse or track their existing TOWER NFT into a different form:

1. **Fuse Maps:** You can turn your lower tier Map NFTs to higher tier ones with TOWER Tokens

<figure><img src="/files/HvMaIgQmy5XbmZdvqSyr" alt=""><figcaption></figcaption></figure>

2\. **Fuse CDH in-game chest:** Convert TOWER Map NFTs into in-game chests

<figure><img src="/files/X34AdERosb9f8ngozeYn" alt=""><figcaption></figcaption></figure>

* Only TOWER Map NFTs fusions are available at Stage 1. Players can merge lower rarity Map NFTs to get a high rarity Map NFT, or you can convert the Map NFTs into Crazy Defense Heroes in-game battle chests (not NFT).

[**Learn more about the Unknown Device feature on Medium**](https://medium.com/tower-token/introducing-the-tower-unknown-device-ddb3c31cefb6)