User blog comment:Sakuraiayano/QUESTIONS ABOUT TOWER EVENTS!/@comment-76.93.144.220-20140108032536

Some wandering ghosts have skill triggers which increase their defense. Events are generally spaced out where there are not many consecutive ones in a row. We just had a tower event, so my best estimate would be at least 2-3 events in between before the next one. We have shrine coming up and most likely after that a guild conquest one for the zodiac sign.