Boss Battle Together

Every day at 20:00, up to 100 players face two bosses in a row together in their own arena, in 5 minutes.

Boss Battle Together arrived on October 8, 2026, from MU Season 16. Every day at 20:00, up to 100 players enter an arena of their own together and have 5 minutes to bring down two bosses in a row.

How to join#

• Registration opens 5 minutes before 20:00: through the Events → Boss Battle menu, or with /bbt join in chat.
• Requires total level 350 (level + Master Level).
• Stay online: at 20:00 you are taken to the arena's waiting room.

How it works#

1. After 30 seconds in the waiting room, everyone goes down to the arena and the first boss appears in the center.
2. When it falls, the final boss appears — always a different one.
3. The bosses are drawn among Illusion of Kundun, Medusa, Selupan, Nix and God of Darkness. Their life grows with the number of participants.
4. Watch out for the wave around the boss and for the circle that marks the ground under someone: step out before it explodes.
5. Whoever dies goes back to the waiting room and comes down the corridor again.
6. Once both bosses are down — or the 5 minutes are up — everyone returns to Lorencia in 30 seconds.

There is no PvP in the arena.

Rewards#

In the Gremory Case, once a day per account:

Whoever completes more than one mission on the same night gets them all. The event panel shows your damage and the minimum for the prize.