Board Thread:Game Discussion/@comment-10687721-20130618151029/@comment-9932745-20130618204744

Just make sure you don't wait too long to use those cubes. Some people were complaining of not getting any lvl6 bosses on the final 2 days of last event but having a big amount of cubes. While people like me have 20-30 cubes with all these lvl6 bosses in your queue.