Mimiron is an encounter in the Ulduar dungeon. The LMS Mark II leads near his room. The fight consists of four phases, and is a rather healing intensive battle for survival. In each phase, Mimiron uses some vehicle or device. In Phase 1, he enters the Leviathan MKII, in Phase 2 it's the VX-001, Phase 3 sports the Aerial Command Unit, and in Phase 4 he enters a composite vehicle consisting of all three previous types together. In each phase, the respective vehicle has to be destroyed, after a short interphase Mimiron enters the next one. On normal mode, Mimiron has a 15 minute berserk timer.