> For the complete documentation index, see [llms.txt](https://whitepaper.octo-gaming.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://whitepaper.octo-gaming.com/game-fi-elements/about-the-octos-nfts/what-are-the-octo-nfts.md).

# What are The Octo NFTs?

### What is an NFT? 

NFT stands for "non-fungible token". 

Let's start at the beginning: what does non-fungible mean? 

The adjective “fungible” is an economic term that refers to a good or an asset that can be exchanged for another good or another asset of the same value. For example, a dollar bill is fungible because it can easily be exchanged for another dollar bill of the same value.

A "non-fungible" item cannot be exchanged for something of equal value. A parcel of land is non-fungible, since each piece of land has its own characteristics, and finding another parcel with exactly the same value is difficult, if not impossible. Art is another example of a non-fungible asset, since its value is highly subjective. This is where NFTs come in.

An NFT guarantees exclusive ownership of a digital asset. You can buy an NFT at a certain price, but the fact that it is non-fungible allows its market value to fluctuate.

### The Octo NFTs

![](/files/itrLWKRPpGn0i2UUooUb)

The Octos NFTs is an NFT collection based on the Solana blockchain and is usable within the OCTO app. 

Each Octo NFT has one actionnable power for a unique game in our mobile app. 

The power can be used only once per game and only one NFT can be selected per game. 

Each usage of power consumes a portion of the health bar, until the health bar goes to zero. Users can recharge it by simply top up in OCTOKN.