Event schedule
What runs on the server, at what time, what each one requires and what it pays. Plus the honest list of what still does not work.
Updated on August 10, 2026Zaikan has eight events live today. Half of the classic Mu Online events, though, are still not implemented: the map exists, the ticket exists, sometimes even the monsters exist, but there is no logic wired to them. This page separates one from the other so you do not waste time.
What is live
| Event | Time (BRT) | Time (UTC) | Requires | Pays |
|---|---|---|---|---|
| Chaos Castle 1 to 7 | every hour | every hour | Armor of Guardsman and a fee of 25,000 to 1,000,000 zen | A jewel 90% of the time and an ancient item from CC2 up |
| Blood Castle 1 to 8 | 21:00, 23:00, 01:00 and every 2 hours after that | 00:00, 02:00 and so on | Invisibility Cloak at the right level | Experience, zen and a Jewel of Chaos for whoever wins alive |
| Devil Square 1 to 7 | 21:00, 01:00, 05:00, 09:00, 13:00, 17:00 | 00:00, 04:00, 08:00, 12:00, 16:00, 20:00 | Devil's Invitation at the right level | Experience and zen by position on the scoreboard |
| Golden Invasion | 21:00, 01:00, 05:00, 09:00, 13:00, 17:00 | 00:00, 04:00, 08:00, 12:00, 16:00, 20:00 | nothing, just be on the map | A guaranteed Box of Kundun from every golden monster |
| Red Dragon Invasion | 23:00, 05:00, 11:00, 17:00 | 02:00, 08:00, 14:00, 20:00 | nothing | A guaranteed Jewel of Bless, Soul or Chaos per dragon |
| Happy Hour | 21:05, 03:05, 09:05, 15:05 | 00:05, 06:05, 12:05, 18:05 | nothing, it counts for everyone online | Normal and master experience multiplied by 1.5 for 1 hour |
| Boss Nix | once a day, drawn between 15:00 and 21:00 | drawn between 18:00 and 24:00 | total level 630 to enter Nixie's Lake | the natural drop of the boss, who stays alive 5 minutes |
| Fourth class trial | on demand, whenever you want | on demand | total level 800 and the quest accepted | the evolution to the fourth class |
| Wandering Merchants | periodic through the day | periodic | nothing | traveling merchants that stay for 60 to 180 minutes |
Golden Invasion and Devil Square open in the same minute. If your character has the level for both, choose beforehand: the invasion lasts 30 minutes and Devil Square locks you in a closed arena for 20.
What is not available yet
The events below show up on any Season 6 list, so it is worth spelling it out: they do not happen on Zaikan today. There is no point waiting for a time slot, stockpiling tickets or looking for an NPC.
| Event | What already exists | What is missing |
|---|---|---|
| Illusion Temple 1 to 6 | the six maps, the internal portals, the statues with an event trigger and the Scroll of Blood ticket, which can already be crafted | the minigame definition and the match logic |
| Doppelgänger 1 to 4 | only the four maps and the portals | everything: the maps do not even have monsters registered |
| Kanturu, with Nightmare and Maya | the event map, the NPC Elpis, the laser traps and the requirement of an equipped Moonstone Pendant | the event engine, and the Nightmare boss itself does not exist on the server |
| Crywolf | the Wolf Status and the five Wolf Altars, with an event start trigger | nothing fires that start, so the statues never spawn |
| Castle Siege | the scenery NPCs of the Valley of Loren, including the crown and the levers | the entire dispute system between guilds |
| Fortress of Imperial Guardian 1 to 4 | the four maps with all the monsters and bosses, the portals and the Secromicon items | the minigame definition and the logic of the trials |
Bosses outside the schedule
Besides the timed events, there are bosses that spawn on their own map and come back after a while. Kundun in Kalima, Selupan in Raklion, the Dark Elf in the Balgass Refuge, Lord Silvester in Urk Mountain, Core Magriffy in Nars, the Lord of Ferea and the Gorgon of Deep Dungeon 5 are all on the bosses page, with health, damage and respawn time.