You need to complete five tasks during an Event.
Two tasks always remain the same:
- Finish the Event investigation by completing all the event quests
- Reach the Master rank in the Event location.
Other tasks are connected to various Event items and are different for each Event.
Each Event offers unique rewards: avatars, boosters, chests, energy items, totems, and stickers.
You can check the Event goals and rewards by clicking/tapping the first icon on the right-hand side of the Main Screen.