# Boss Challenge (PvE)

* Type: PvE
* Objective: Defeat waves of AI-controlled enemies and a final boss.
* Gameplay:
  * 3 Lives: Players begin with limited lives to complete all 40 challenge waves.
  * Shop: Players can buy items in the shop between waves, each time the Shop appears, it will disappear after 20 seconds.
* Rewards: Victory unlocks Item Upgrade Chests, additional Gems or Empty Hourglass.

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