This level is only playable during clan wars on weekends. You have to be in a clan with at least 2 people before the weekend starts. Or you can practice it any time if you are a supporter on Patreon
There's no treasure there, thus no treasure chests. You also can't use treasure chests from your inventory. No way to build up thousands of swaps! This level is competitive.
Bosses: The same mother dragons the first level.
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