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

# Level Up

#### There are three levels, ranging from 1 to 3. Each level and tier costs $Lay 007 and $Orb to upgrade to the next level. It also takes time to level up.

[Time](/orbcity/building/upgrading-system/level-up/time.md)

[Chance of level up](/orbcity/building/upgrading-system/level-up/chance-of-level-up.md)

[Cost](/orbcity/building/upgrading-system/level-up/cost.md)

{% hint style="danger" %} <mark style="color:red;">**Note: Keep in mind that all tokens and NFTs spent on the upgrade are irrevocable and non-refundable.**</mark>
{% endhint %}