User blog comment:Akrie/September 16th Events & Updates~!/@comment-50.92.46.43-20150917032006/@comment-25889587-20150917112129

There's nothing pointed towards a medal system other than the fact that the Kakao version has already done that.

Besides, when Kakao releases the City of Wizards, the previous episodes were not renewed until one or two months later. Updates that changes the game mechanics are totally random though.