> For the complete documentation index, see [llms.txt](https://burgerswap.gitbook.io/burgercities/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://burgerswap.gitbook.io/burgercities/gameplay/battle-function/main-chapter.md).
# Main Chapter
Players can enter the “Main Chapter” interface by clicking the button below. It will be the main part of the whole PVE system. “Main Chapter” has been divided into two parts which are General and Elite. “Elite” means a higher level of gameplay that can offer better rewards.
Players can click the “Challenge” on the downright to participate in the battle. “Stage 5–4” means the current level of this chapter. You can click to view or clear cleared raids (levels that have not been challenged are not accessible).
Main Chapter Overview
All heroes in the battle team need to consume Health and Energy when they challenge the new chapter for the first time. (each level costs a Fixed Health and Energy.)
Clear Raids need to consume fixed Health, Energy, and Stamina for all of the heroes in the battle team( at least 1 hero, up to 4 heroes). For some special levels, there is a limit on the maximum remaining times per day. Players need to meet some specific requirements in order to clear raids successfully, such as Hero Level, Hero Rarity, Elemental restrictions, and the number of heroes. Different levels have different limits, and players need to check them specifically in the game.
If players can’t launch the Challenge or Clear Raids, there are some notices on the interface, promoting “Insufficient Energy” or “Which Hero has insufficient Health or Stamina. ”
Clear Raids Overview
When players successfully clear raids or challenges, we offer the following types of rewards：
1. Rewards after victory. (such as the EXP of heroes）
2. Rewards of stage box. (such as the gold box）
3. Gold and some materials in Main Chapter. (such as the materials for equipment manufacture）
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