Wing is an Item you need to use if you want to play the Adventure Mode.
Wings are refilled up to 300 daily at 6:00AM (GMT+9), and it can also be purchased with Cherries or Gems.

※ Keep in mind that the Wings are refilled if you enter the Adventure Mode. If you do not enter the Adventure Mode after 6:00AM (GMT+9), the Wings will not be refilled.