> For the complete documentation index, see [llms.txt](https://docs.pixiland.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.pixiland.app/hero/hero-stats/hero-upgrade.md).

# Hero Upgrade 

### Overview

The Merge Hero system in Pixiland allows players to upgrade their heroes by merging two identical heroes to create a stronger version. This feature enhances gameplay by enabling progression and encouraging players to collect and upgrade their heroes strategically.

### Upgrade Rules

**Same Hero Requirement:** Only two identical heroes can be merged.

**Star Level Upgrade:** The merged hero will gain +1 star level.

**Max Star Level:** Heroes can be merged up to a maximum of 5 stars.

**Resource Cost:** Merging heroes requires a specific amount of in-game resources.

| Star Level | $Gold | Gem |
| :--------: | :---: | :-: |
|      2     |  5000 |  4  |
|      3     | 10000 |  8  |
|      4     | 15000 |  12 |
|      5     | 20000 |  16 |

**Stat Boost**: The new hero will have improved attributes based on predefined scaling factors.