> For the complete documentation index, see [llms.txt](https://fishinglands.gitbook.io/whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://fishinglands.gitbook.io/whitepaper/game-version-2/blend.md).

# Blend

Upgrade function is use to upgrade your tools rarity, and this is the one of burn mechanic

#### ***Case Example:***

***At least you have to reached level 5***

*Common + Common + Common + 200 FSLF and 200 FSLS ==> Rare*

![](https://3478964819-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FAb5gZrrvfLxJVvZDm3lq%2Fuploads%2F7ZRKs5m5T5APTdeX4z2t%2FBlend.PNG?alt=media\&token=d5d6806e-44b6-4b9e-b0dd-a1724f0e2573)