MU Online Season 22: not announced, and here is what we know
As of 26 September 2026, Webzen has not announced Season 22 for MU Online, globally or in Korea. The newest official content is Season 21-1 Part 3, released on 1 September 2026, and Webzen's update guide index ends at Season 21-1. Pages that advertise "Season 22" belong to private servers, not to Webzen. MUOnline.ai does not run Season 22; it runs Season 21 Part 3 server files (a private-server label, not a Webzen version).
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What Webzen released instead
Webzen publishes patch notes every Tuesday. The most recent global updates are:
- 25 August 2026: Speed Server Plus, running until 12 January 2027.
- 8 September 2026: Castle Siege opens on the Idavoll server.
- 15 September 2026: the 23rd MU Season Pass.
- 22 September 2026: Mastery & Mystery and Jewel Bingo events, running until 13 October 2026.
- 29 September 2026: scheduled maintenance, 07:00-09:00 UTC.
Where the next content will come from
Korea is roughly nine to ten months ahead of the global service: the Korean Season 21 updates arrived on 30 September and 28 October 2025, followed by a five-class renewal on 21 April 2026 and Forgotten Raklion with a level cap of 1,800 on 19 May 2026. None of it is called Season 22 by Webzen, and none of it is on the global service or on this server. We will post here the day Webzen names a Season 22.
What this means on MUOnline.ai
Nothing on this server is Season 22 content. The Permanent Realm (5000x EXP, 60.000 max stats) and the Speed Realm Autumn Edition (99.999x EXP, opened 4 September 2026) both run on the same Season 21 Part 3 server files; what Webzen shipped in Season 21-1 is covered in Season 21 Part 3: what is new, and the two realms are compared on the realm page.