How do I move to the next Treasure Hunt level/difficulty?To move to the next difficulty, your alliance needs to collectively donate a number of attempts.
Hit the 'Unlock Level 2' button in the top left corner of the Treasure Hunt screen and then select 'Donate'.
Here, you can donate your attempts towards the noble goal of unlocking the next level (a.k.a. 'difficulty'). Every alliance member who can participate in the current Treasure Hunt can also donate their attempts.
Once all the required attempts are collected, you still need to unlock the difficulty for yourself, by completing all available encounters:
When done, you can start the next difficulty:
The second and third difficulty both come with more challenging encounters, but they also provide better rewards.