> For the complete documentation index, see [llms.txt](https://cointofish.gitbook.io/cointofish-en/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://cointofish.gitbook.io/cointofish-en/information/fusion-system.md).

# Fusion System

It is possible that the information you are about to see below will undergo changes at launch. It is not something that will be available the first day after the launch of the game.

We know that in this kind of games getting a low rarity monster can be a bit frustrating... Therefore we are working on a system that will allow you to use your rarity 1 and 2 monsters to improve the rarity of your strongest monsters.

![Fusion example for Rare 1 + Rare 3 = Rare 4](/files/-MjjEyuvUnTJA5REaAYf)

In the example above we can see that a fish of rarity 1 and a fish of rarity 3 are combined to obtain a fish of **rarity 4**.

In addition, by merging we will obtain an additional advantage. The fish resulting from the fusions will have a **75%** chance of appearing with a random **skin color**.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter, and the optional `goal` query parameter:

```
GET https://cointofish.gitbook.io/cointofish-en/information/fusion-system.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.
