【Rule Background】     Sky Tower is being guarded and repaired by academy until now, as it is the place which used to suppress the strong devil that ever disturb the Star Land. Time flies, Sky Tower become old, and the spell is unstable too, so that the elders of Star Academy decided to gather more people. One group of people go repairing the tower, other side to allow students that fulfill the requirements to enter the tower and challenge the devils under the protection of spell. The purpose is to train the academy and control the hostility of devils. 【Conditions to join】     Level of character more than 40 and 3 players or above in a team to challenge. 【Challenge Rules】     The Monsters of Sky Tower don’t have the limit of challenging, whereas players can only get one chest reward from each BOSS. There are 4 BOSS in each floor, kill them all to receive the rewards. Moreover, players could get fortify lucky pack if team-up with beginners and challenge the 1st floor.