The below is copy and pasted (more or less) from the Alchemist Code news. To see the full news with all images, go here: https://news-site.alcww.gumi.sg/html/whatsnew/

Mobius Tower

Pair up with other players in this 2-player cooperative tower event!

Clear each floor to get attractive rewards such as Gold Gear Shards, Omnicrystal Equipment Shards, Omnicrystal Equipment Diagram Pieces and up to 1500 Gems!

Event Period

January 17, 12:00 AM - January 30, 11:59 PM (World Time / PST)

First Clear

Clear floors to obtain all available rewards, including Zeni.

Subsequent Clear

Clear floors again to obtain Zeni-only rewards.

Reward List

https://news-site.alcww.gumi.sg/html/resources/images/up/news_banner_MobiusTower_RewardsTable_EN_1547512571844.png

Milestone Missions

Mystic World Mobius Daily Mission Play the Mystic World Mobius Tower once and complete the Daily Mission to obtain 100 Gems!

Assist other players in Mystic World Mobius

Obtain Limited Event Achievement Titles by helping other players clear Mystic World Mobius!

Players who have already cleared floors can earn these titles by helping other players who have not cleared any floors.

You can obtain an achievement title for helping with 50, 100, 500, 1000 clears!

Achievements obtained can be found in Menu > Titles.

Event Details:

• This event costs 0AP to enter!
• Mercenaries cannot be used.
• Clear the floors during the event period to obtain attractive rewards!
• Pair up with another player and cooperate to clear this event. You may also enter the event alone.
• Units Level 20 and higher can participate in this event, with 2 Units in the Main Party and 1 Unit in the Sub Party.
• Map effects and weather effects are in place for some floors.
• Players can decide initial unit placement before entering battle.
• Cleared floors can be cleared again.

Return to the Underworld

Event Period

January 17, 12:00 AM - January 30, 11:59 PM (World Time)

Collect 80 Shards to transmute Cursed Kunai - Blood Edge!

Cursed Kunai - Blood Edge

Attributes: HP Up, PATK Up, DEX Up, Chance of inflicting Daze

Enables Master Ability when equipped on Jin (3-hit Dark Dmg & Poison to single target & raises own AGI until next turn [Range: 5, Height Range: 2])

Class change Arkil from Magic Swordsman to Magic Swordsman !

Complete the Quest Mission to obtain the job tokens needed for his class change.

Clear the Event Episodes and EX stage to obtain the Job Equipment for his Magic Swordsman Job!

Ex stage will be available in both Events and Multiplay during the event period!

You can also clear the Event Quest Missions to obtain Dark Soul Shards and Fire Soul Shards!

Notes

• Milestone Missions can only be cleared once, if you have already cleared the missions before, it won’t be available again.

Maintenance

Maintenance Period

January 16, 10:00 PM - January 17, 4:00 AM (World Time / PST)

We will be carrying out server maintenance during the time period above. The game will be inaccessible then. To prevent any data loss, please refrain from trying to access the game during maintenance.

Please note that during maintenance, we are still updating the in-game items and news so please check in once maintenance ends to get the latest updates in-game!