Once you have reached level 12 you will have access to everything the game has to offer, this includes the additional game mdoes in The Night World which includes Devil Rumble, Exploration, Underground, and Event Dungeon.
This is a PvP mode where you can battle against other players for Rumble coins and crystals. Devil Rumble is playable in the Night world, it is 5v5 like the Story dungeons and the match is over when one side is defeated. A Rumble ticket is needed to play, the maximum number of these tickets you can hold at any one time is 5 and they are recharged every 30 minutes. You can spend crystals to recharge tickets, which cost 100 crystals per ticket. Upon winning a match you will earn League points and it is these points that determine the league you play in and the reward you receive. The higher you climb up the ranking the better rewards you will receive. The reward is crystals and Rumble coins and they are awarded every Monday when the Rumble is reset, in order to claim the rewards though, you need to participate in the Rumble at least 10 times every week.
This mode enables you to earn EXP for your characters and find some extra item chests without much effort. You can send a team of your characters an hour up to 12 hours and they will continue with this even if you are offline. The longer you send your Childs, the better the rewards. You can unlock all the Exploration slots upon reaching level 30. The characters you send on explorations can still be used in story battles and other game modes.
The Underground is similar to towers in other RPGs, it consists of 15 stations across 5 colonies and you have to continuously battle to reach each one with the damages and statuses of your characters carrying over to the next one. This mode is basically a dungeon crawler where you can earn rewards on every stage with treasure chests found on every fourth stage. The objective is to finish all twenty stages so that you unlock the next difficulty level. If your character dies it suffers a 'permanent' death for the duration of the Underground. The death only applies to Underground mode and will not prevent you from using that child in other modes. Underground resets daily.
In this mode you will be able to earn Level-up Materials, Evolution Materials, and gold. The dungeons will change daily and you can battle through the available dungeons 3 times per day. Once you have entered Event Dungeon mode you can view the schedule of the dungeons by clicking the qestion mark at the top of the screen. Although battling in these dungeons will consume stamina the reward you can get from them are worth it as they will help you to progress faster in the game.
• Monday - Light element Level Up Material
• Tuesday - Fire element Level Up Material
• Wednesday - Water element Level Up Material
• Thursday - Wood element Level Up Material
• Friday - Dark element Level Up Material
• Saturday - Fire, Water, Wood element Level Up Material
• Sunday - Light, Dark element Level Up Material