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 has unique rewards: avatars, boosters, chests, energy items, totems, and stickers.
You can view the Event goals and rewards by tapping the first icon in the Right-Side Menu on the Main Screen.