Thanks for your feedback!
Hello and thank you for your feedback!
After the 1.0 update, we have received many feedback regarding new content, including the Act 4 boss, new hero, etc. And we are acknowledged and working on fixing what's wrong.
In the latest update, we keep the mechanic of limited-time challenge while removing the frustration of instant wipe if failing to complete the challenge, instead we added the ultimate phase where you can still win the fight.
You can visit this announcement for more info:
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