Event Dungeons are limited time battles you can play. They are usually displayed before everything else.

There are currently only two types of these events.

Super Battle

Super Battles are time-limited grind events featuring a series of character introduction cutscenes and battles that grant you event points.

In order to gain rewards, gather points by repeatedly playing the event's mission over and over. As you reach different point milestones, you are awarded rewards that can be claimed from the present box.

In addition, there may be a ranking or community objective too do for more rewards.

Invasion

Invasions are limited time glory fights that rewards nothing but first clear rubies and feature a set of novel bots for you to fight against.