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

# Crystals

Crystals provide a pathway to upgrade your character tiers (from 1 to 5). Multiple crystals will be needed to upgrade a character at each tier which are won during combat or purchased on the black market from other players.

The chance to receive a regular elemental crystal is 5%, this crystal will be aligned to one of the elements.

![](https://1174629989-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FrHhmpOKEjqIpdBEm9Jv3%2Fuploads%2FpFN2z3Ynz0jTq48vcTSr%2F1_jDYSs8KMceBR3RHMc2FCOQ.png?alt=media\&token=63bfb259-5462-4054-9985-9ed7ac3d5d28)

There is also a chance (2%) for the rare special crystal which matches all elements.

![](https://1174629989-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FrHhmpOKEjqIpdBEm9Jv3%2Fuploads%2F5PHZ8yFwcjZRFH9oLFMM%2F1_5AnVFJkeHBHfM-aijINSWA.png?alt=media\&token=a46ae5f3-8fba-42f9-b865-e825e9a9faad)