> For the complete documentation index, see [llms.txt](https://ancient-warfare.gitbook.io/ancientwarfare/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://ancient-warfare.gitbook.io/ancientwarfare/special-feature/upgrade.md).

# Upgrade

In order to increase rarity levels, damage stats, rewards and winning rates, players can upgrade their heroes using our built-in feature Each upgrade to a higher rarity level has a specific odd for success and only requires a number of tokens. This mechanics facilitates an intriguing gaming experience as players can upgrade a hero's rarity level from common to mythical effortlessly