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Idle MU

Nightmare

level 145event only

Nightmare is a level 145 MU Online Season 6 monster with 1,500,000 HP and 3000–3500 damage. It doesn't spawn on the open map: only events create it.

HP

1,500,000

Defense

7,500

defense rate 2,500

Respawns in

0s

Damage

3000–3500

attack rate 3,000

Updated 10/22/2026, 11:19 PM