Mirror Dungeon Level Progression Guide (131–170)
Mirror Dungeons form a four-tier progression chain spanning levels 131 to 170. Each dungeon's monsters are tuned to a specific level bracket, and entering too early means fighting significantly overlevelled enemies — or failing to survive. This guide tells you exactly when to move to each dungeon.
When to Enter Each Dungeon
| Level Range | Dungeon | Regular Mobs | Boss Level |
|---|---|---|---|
| 131–140 | Closed Mine | 131–139 | 140 |
| 141–150 | Demonic Cave | 141–149 | 150 |
| 151–160 | Keura Monastery | 151–159 | 160 |
| 161–170 | Sunken Sanctuary | 161–170 | 170 |
The rule of thumb: enter a dungeon when your level matches the lower end of its monster range. At 131 you can start Closed Mine. At 141 move to Demonic Cave. At 151 move to Keura Monastery. At 161 move to Sunken Sanctuary.
Dungeon 1: Closed Mine (Level 131–140)
Enter at: Level 131
Monsters: Atrium Sap, Wasteful Thoughts, Cronium Stone, Sedrium Spider (levels 131–139)
Bosses: Mining Mk.II, Tabasco (level 140)
Closed Mine is the entry point for the Mirror Dungeon chain. Mobs here are the easiest of the four and serve as reliable Onyx Fragment material farming while your character builds toward the 141 threshold for Demonic Cave.
Dungeon 2: Demonic Cave (Level 141–150)
Enter at: Level 141
Monsters: Toxic Plant, Contaminated Plant, Multidimensional Knight, Multidimensional Warrior (141–147); Ancient Mummy, Muron of Dimension (147–149)
Bosses: Twisted Multidimensional Guardian, Minotaur, Bloody Murder (level 150)
Demonic Cave introduces a split among its regular mobs — the lower-level group drops Unknown Onyx Fragments and Rough Transcendence Stone, while the higher-level group drops Onyx only. It is the only Mirror Dungeon with a Rough Transcendence Stone drop from regular mobs, making it worth revisiting even after you outgrow it for boss farming.
Dungeon 3: Keura Monastery (Level 151–160)
Enter at: Level 151
Monsters: Deranged Farmer, Dominated Devotee, Prayer of Turbulence, Spellbook of Wrath, Corrupt Instigator, Experimented Devotee (levels 151–159)
Bosses: Lazy Dungeon Keeper, Reggiebell, Drawjeff Gnome (level 160)
Keura Monastery has six regular mob types, more than Closed Mine's four. The mobs are significantly stronger than Demonic Cave — do not rush here at 151 with underequipped gear. The three bosses at 160 represent a meaningful DPS check compared to the two bosses in Closed Mine.
Dungeon 4: Sunken Sanctuary (Level 161–170)
Enter at: Level 161
Monsters: Submerged Pillager, Submerged Resident, Ruler of the Water, Water Steelers, Sea Hunter, Sea Watcher (levels 161–170)
Bosses: Taclaus, Aquamoss, Accratheater (level 170)
Sunken Sanctuary is the final and hardest Mirror Dungeon. Its bosses are the only ones to drop a Sealed Onyx Weapon directly — skipping the fragment crafting step entirely. If your level and gear allow it, prioritise this dungeon above all others.
Progression Summary
Lv 131 → Closed Mine (Violet Chakra, Fire-A Ring)
Lv 141 → Demonic Cave (Red Chakra, Fire-B Ring + Rough Trans. Stone)
Lv 151 → Keura Monastery (Gray Chakra, Fire-C Ring)
Lv 161 → Sunken Sanctuary (Blue Chakra, Fire-D Ring + Sealed Onyx Weapon)
Q: Can I enter a higher-tier Mirror Dungeon before reaching its level range?
A: You can enter, but the monsters will be several levels above you, making efficient farming impractical. The level brackets are designed as hard skill gates — wait until you are within the monster level range before committing to a dungeon.
Q: Should I stay in a lower dungeon to stock up on materials before moving up?
A: Only if you need a specific item exclusive to that dungeon — such as Rough Transcendence Stone from Demonic Cave. Otherwise, move up as soon as your level qualifies. Higher dungeons drop better materials and the same 54 Slot Bag and Weapon Change Ticket from bosses.
Q: Do I need to complete the previous dungeon to unlock the next one?
A: No. All four Mirror Dungeons are independently accessible from the start. Progression is gated by level and gear, not by completion of the prior dungeon.