The Royal (Hat) Adventure
Kind of surprised they started another right when the previous one ended.
Anyway, this one requires the crown hat set which is one of the oldest and cheapest hat sets out there so everyone should have it.
Nine Rounds
Rewards are rare chest (after 1), 1,000 feathers (after 3), 2,000 feathers (after 5), 5,000 feathers (after 7) and 10,000 feathers at the end.
Event run for 5 days.
Switching to the crown hat does not give you extra FP.