> For the complete documentation index, see [llms.txt](https://guides.epicmu.net/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://guides.epicmu.net/chaos-machine-craft/wings/mu-online-wing-level-4-guide-advanced-crafting-and-upgrade-system.md).

# MU Online Wing Level 4 Guide – Advanced Crafting & Upgrade System

Discover how to craft and upgrade Wing Level 4 items in MU Online Season 21 including relic systems, crafting materials, Chaos Machine combinations, and enhancement strategies.

<h2 align="center">Hello Adventurers of the Epicmu Universe !!</h2>

{% hint style="info" %}

<p align="center">Let’s get started on <strong>crafting your Level 4 Wings</strong> step by step.</p>
{% endhint %}

<h3 align="center"><strong>How to creat ?</strong></h3>

<h4 align="center"><strong>Step 1 - Open Chaos Machine "Equipment Reinforce"</strong></h4>

<div align="center"><figure><img src="https://676687583-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgxJrWcmzkEbdFVF3z6KB%2Fuploads%2FXsEB9A3PqNEZeoAGUYWl%2Fimage.png?alt=media&amp;token=5d444aa7-97a6-49d1-9d36-c7a510ad538f" alt=""><figcaption><p>Illustrative image</p></figcaption></figure></div>

<h4 align="center"><strong>Step 2 - Wings Combination -> Fourth Wings -> Fourth Wings Production</strong></h4>

<div align="center"><figure><img src="https://676687583-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgxJrWcmzkEbdFVF3z6KB%2Fuploads%2FgtmLLeNqaaxGobyDnFtK%2Fw4-relic.png?alt=media&amp;token=a2f0aae4-2261-4c78-ac3c-2a6e1fcabd9e" alt=""><figcaption><p>Illustrative image</p></figcaption></figure></div>

<h4 align="center"><strong>Step 3 - Wings Combination -> Fourth Wings  ->  Fourth Wings  Production</strong></h4>

<div align="center"><figure><img src="https://676687583-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FgxJrWcmzkEbdFVF3z6KB%2Fuploads%2FJehJQFlKEXnnQMgDecLI%2Fw4-relic2.png?alt=media&amp;token=d34b72d5-0db1-4cc8-a8f0-5e59d3bd6e18" alt=""><figcaption><p>Illustrative image</p></figcaption></figure></div>