The Kingdom Prize Boost event is another great opportunity to progress and complete your Kingdom!
While this event is active, completing a Kingdom will give players boosted rewards instead of the usual ones. The reward is given when you proceed to the next kingdom.
Please note that the boosted rewards are not given in addition to the regular rewards. The boosted reward is an upgraded version of the regular reward.
For example: Instead of getting the usual 10 rolls and a Sticker Pack, you get 30 Rolls and a Sticker Pack when the Kingdom Prize Boost event is active.