MU Online Starts Halloween Event and 33rd Season Pass in Oct. 13 Patch

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MU Online’s Oct. 13, 2026 patch is live, kicking off the game’s Halloween event, the 33rd MU Season Pass, and a new Maze of Dimension event.

According to the official patch notes, the update also marks the end of the Mastery and Mystery Event and the Jewel Bingo Event. Webzen didn’t include additional event details in the patch note itself, so players will need to check in-game or watch for separate announcements for reward specifics and timing.

The patch also adds Polish language support, though Webzen says that change is covered in a separate notice.

Further reading: Official MU Online patch notes