Secret
Muzan
Endless Secret: bleed/DoT damage that also buffs Demon Slayer teams, unlocked by an Invitation that drops around wave 40-50.
Overview
Muzan is the Endless mode Secret. Around waves 40-50 a small Invitation prompt appears above your team for roughly 20 seconds; click it with an Invitation in your inventory and Muzan is yours. The drop rate started at 0.2%, was buffed to 0.5% on 2026-10-26 and to 1% on 2026-10-27, and the INVITED code hands out one Invitation outright to level 100+ accounts. He deals bleed damage over time and lifts Demon Slayer units on the same team.
How to get Muzan
Run Endless past wave 40 and watch for the Invitation pop-up above your team. Have the Invitation item in your inventory first — the prompt is short-lived.
- Easiest route: redeem INVITED (level 100+) for a guaranteed Invitation
- Drop rate history: 0.2% → 0.5% (10/26) → 1% (10/27)
- Failure to click in time burns the run, not the item
Why Muzan matters for Demon Slayer teams
Muzan is the Secret that makes the Demon Slayer universe bonus worth building around: Tengen's Demon Slayer damage aura is reported to jump from 20% to 30% with Muzan on the field, and Muzan's own bleed ticks do the sustained damage that burst units leave on the table.
Also written as
Some guides list Muzan under an altered spelling: Muzan Kibutsuji. It is the same unit.
What is confirmed vs reported
- The exact wave the Invitation appears is community-reported (~40-50); the developer only says Endless
- Tengen's bonus with Muzan on the team is community-reported at 30% (20% without him)
Source
Official Discord 📃┃update-logs 2026-10-26 ('buffed invitation drop chance from .2% to .5%') and 2026-10-27 ('increased muzan invitation chance to 1%'); invocation flow + wave range from ❓┃questions; INVITED code from 📢┃announcements 2026-10-26
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Anime Galaxies is developed by Champions TD. This wiki is an independent fan project — see About for more. Anything the developer has not published is labelled as a community report rather than presented as fact.