As this tower event is unique from the rest, PLEASE READ THE SUMMARY FOR THIS EVENT to prevent mix ups and confusion!
JP Wiki page
This Tower Event is a unique one compared to the others that we had in the past.
This tower event is an event with 20 floors per lap and boss fights will occur every 5 floors. In the normal fights, you are generally allowed 3 allied units and only 1 of your own unit. The deploy layout somewhat resembles the deploy limit for Mina's Trials of Whim for non-EX quests.
The cooldown in 'The Cave of Mischief' is the same as the cooldown in other tower events.
Once you have completed all 20 floors, you complete a lap and start over again at floor one. For each 5 laps completed, you get one of the prizes that will be listed below.
Tower events tend to be time consuming but less "pay to win." They also tend to be great for beginners because you can easily get a 5* monster unit which tends to be recruitable (and thus you get a 5* unit after recruiting it at the next recruitment event, yay! )However, for this tower event, the event units that you get from this event will be units instead of monsters.