Mirror Dungeon
The Mirror Dungeon is a major aspect of Limbus Company gameplay, allowing the player to "grind" for materials without limit. They encourage players to build up E.G.O Gifts catered to their deployed Identities, forcing the choice between a variety of theme packs and encounters as they progress through floors featuring enemies from the main story and Refraction Railways.
Mirror Dungeons are updated once every Season, sometime after all new Canto story content has been released. Both an Easy and Hard mode are available, netting slightly different rewards.
Overview
The Mirror Dungeon is a secondary game mode in which the Manager traverses a randomly generated dungeon. A new Mirror Dungeon is released every Season, and each makes extensive changes to the gameplay of the previous Mirror Dungeon. All Mirror Dungeons have two Difficulty levels: Normal and Hard. Entry to Mirror Dungeons is free. However, redeeming their rewards requires spending Enkephalin Modules. The base version of a Mirror Dungeon requires 5 Enkephalin Modules to claim rewards, while the hard version requires 6 per weekly bonus used and 5 if none are used.
Sin Resources persist in the Dungeon between Encounters, allowing the player to save up resources that can then be spent on later battles.
Rewards
Every week, 3 weekly bonus charges are recharged. Managers who clear the dungeon will be able to claim
Lunacy and Limbus Pass XP for the Battle Pass with a number of Enkephalin Modules. If the Dungeon is played in Hard Mode, multiple bonus charges can be used at the same time, decreasing the number of Dungeon runs needed to gain all rewards.
Leaving the dungeon early still allows you to claim rewards, but gives fewer resources for the same cost. Notably, all
Lunacy can be obtained by clearing Floor 4 and skipping Floor 5.
| Weekly Bonus Charges Used |
Rewards | Total | ||||
|---|---|---|---|---|---|---|
| 3 (Hard Mode) |
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| 2+1 (Hard Mode) |
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| 1+2 (Hard Mode) |
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| 1+1+1 (Hard Mode) |
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| 1+1+1 (Normal Mode) |
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| 0 (Normal or Hard Mode) |
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List of Mirror Dungeons
Every Season, the previous Mirror Dungeon is replaced with a new Mirror Dungeon based on the current Season and its respective Canto. All Mirror Dungeon Normal modes can be accessed upon the completion of Canto II: The Unloving, but completing more Cantos and Intervallos increases the diversity of enemies, as well as unlocking the Hard mode.
| Mirror Dungeon | Description |
|---|---|
Mirror of Immortality July 3, 2025 - Present |
Mirror of Immortality Replaced Mirror of the Dreaming starting on the July 3rd, 2025th update.
|
Mirror of the Dreaming November 28, 2024 - July 3, 2025 |
Mirror of the Dreaming Replaced Mirror of the Wuthering starting on the 28th November, 2024 update.
|
Mirror of the Wuthering May 2, 2024 - November 27, 2024 |
Mirror of the Wuthering Replaced Mirror of the Lake starting from the 2nd May 2024 update.
|
Mirror of the Lake December 14, 2023 - May 1, 2024 |
Mirror of the Lake Replaced Mirror of the Beginning and Mirror of Mirrors starting from the 14th December 2023 update.
|
Mirror of Mirrors June 29, 2023 - December 13, 2023 |
The Mirror of Mirrors was introduced in addition to the Mirror of the Beginning in the June 29, 2023 update.
|
Mirror of the Beginning Game Launch - December 13, 2023 |
|
Mechanics
Starlight
Starlight is an unique currency used to provide buffs to Mirror Dungeon runs. It is used to activate Starter Buffs and to perform Theme Pack Observation, Wishmaking, and E.G.O Gift Search.
It can be obtained via 2 main sources: clearing Mirror Dungeons and Extraction.
| Source | Quantity | Notes |
|---|---|---|
| Initial | 600 Starlight granted upon first unlocking the Mirror of Immortality. | |
| Extraction | Obtaining a newly released Identity or E.G.O for the first time within 2 weeks of its release through Extraction or Yisang Exchange grants 300 Starlight. | |
| Default | 60 Starlight per run | |
| Loadout Bonus | 1 Starlight for every Rest Bonus Charge for Identities used in this run (Rest Bonus regenerates by 1 for every Mirror Dungeon run an Identity did not participate in) | |
| Cleared Floors | Gain Starlight equal to the Floor number upon clearance (up to 5 Starlight / Floor) |
|
| Hard Difficulty | Additional (4 * Floor number) Starlight upon clearing a Floor in Hard Mode (up to 20 Starlight / Floor) | |
| Refraction Railway Theme Packs | 5 Starlight / Refraction Railway Theme Pack cleared. | |
| Encounter Reward Cards | Clearing Encounters occasionally gives a choice of Reward Cards; Reward Cards giving Starlight give a small to medium amount of Starlight depending on level |
|
| Adversity Score | Gain 15 Starlight for every Adversity Score at the end of a run. | |
Encounters
Mirror Dungeon enemy encounters are randomly chosen based on the Theme Pack selected.
All combat encounters will have Attack Type or Sin Affinity weaknesses listed below them. For Abnormality Encounters/Focused Encounters, only the Sin Affinity weaknesses will be list. If the Boss encounter is an Abnormality, both will be displayed instead.
While an event is running, the theme pack appearance chances will be altered, and an event-related Theme Pack will always be available on the final Floor.
As of April 25, 2024, the flavor text on all of the encounters no longer exists, replaced with a single giant text. With the release of the Mirror of the Wuthering, the name of all Battle encounters are replaced by the name of the Floor Theme Pack chosen for the current Floor.
| Icon | Type | Identity Encounter |
|---|---|---|
| Normal Encounter | Chain battle encounter. | |
| Coin Icon | Risky Encounter | Chain battle of Humanoid/Monsters at a higher Level. |
| Focused Encounter | Focused encounter of Peccatula. | |
| Abnormality Focused Encounter | Fought Abnormality corresponds to Abnormality Core displayed. Grants two E.G.O Gifts upon beating the Abnormality. The gifts are the same as those obtained through an abnormality event. | |
| Boss Encounter | Focused Boss Encounter. Each Floor Theme Pack has its own pool of potential bosses. | |
| Abnormality Event | Abnormality Event (See Below). Some Abnormalities can be fought. | |
| Shop | Cost can be exchanged here for E.G.O Gifts, Healing, and other Functions. See Shop Functions. Shop Nodes will appear before the final Boss node of every Floor. |
Theme Pack Observation
When in the Theme Pack selection menu, the "Search" tab on the top-left corner may be toggled to perform "Theme Pack Observation", where a Theme Pack in a specific slot may be replaced with another Theme Pack of one's choosing from the pool of Theme Packs available on the current Floor. Theme Packs already displayed, or already visited on previous Floors, cannot be chosen.
Theme Pack Observation costs 20
Starlight initially, with the cost increasing by 10
Starlight each time a Theme Pack is replaced. It can be done infinitely many times each Floor.
Cost
Each enemy Encounter the player successfully defeats allows the manager to earn some
Cost. The amount of Cost gained from each Encounter varies according to the type of the Encounter, and the difficulty of the Mirror Dungeon Floor:
| Encounter Type | [NORMAL] |
[HARD] |
|---|---|---|
| Normal Encounter | 75 |
85 |
| Focused Encounter | 100 |
120 |
| Risky Encounter | 120 |
150 |
| Abnormality Focused Encounter | 150 |
180 |
| Floor Boss Encounter (Increases throughout the dungeon) | 200+ |
250+ |
Certain E.G.O Gifts also increases the Cost gained from Combat Encounters, with varying degrees of efficiency depending on the exact mechanism.
Cost is also gained upon initial entry of the Mirror Dungeon; the exact amount of starting Cost depends on the amount of leftover Starlight charges the Manager had after selecting their Starter Buffs if the manager wishes so, with a ratio of 1 Starlight=5
Cost. This is then added to a base starting Cost of 200
Cost.
Certain Starter Buffs also increases the amount of starting Cost.
Cost can be spent at Shops for Sinner Skill replacement, healing, purchasing or boosting E.G.O Gifts, or Team adjustment.
Shop Functions
| Name | Type | Additional Details | |
|---|---|---|---|
| Heal Sinner | Heals either all Sinners or one Sinner | 100 | The manager can choose to heal one Sinner by 50% HP and 45 SP, to heal all Sinners by 15% HP and 15 SP, or to revive a dead Sinner. Can be purchased indefinitely. |
| Team | Adds a new Identity/E.G.O to the team | 100 | Allows the manager to adjust the Identity and/or E.G.O of up to three Sinners. 100 Cost will be spent regardless of the number and nature of replacements. |
| Skill Replacement | Replaces the selected Sinner Identity's Skill (picked at random). | 45 (replace Skill 1 with Skill 2) 75 (Replace Skill 2 with Skill 3) 120 (Replace Skill 1 with Skill 3) |
An attack Skill will be replaced once purchased, altering the skill distribution of the selected Identity. (*) |
| E.G.O Gifts | Adds an E.G.O Gift to the arsenal | Dependent (140 - 600) | Does not show already obtained or stage-exclusive E.G.O Gift inside. Displays 4 Gifts per Dispense visit. Certain |
| Refresh | Refresh the pool of E.G.O Gifts being sold, and the Sinner available for Skill Replacement. | 15 Cost; +15 for each refresh | Certain E.G.O Gifts reduce the Cost of Refreshing, or gives a chance for a Cost refund after a Refresh. Certain |
| Keyword Refresh | Identical to Refresh, except that the player may choose a Keyword that the Refresh will more likely produce. | 90 Cost; +15 for each refresh (linked with normal Refresh) | Certain |
| Sell E.G.O Gifts | Sell unwanted E.G.O Gifts for Cost | Varies (+50 - 300) | E.G.O Gift sale price is 50% that of its purchase price. |
| Enhance Gifts | Enhances effects of certain E.G.O Gifts. | Depends upon Gift Tier and Enhance Tier (50 - 200) | Not all E.G.O Gifts can be enhanced. For a list of enhanceable E.G.O Gifts and their effects, see List of E.G.O Gifts/Enhance. For exact Cost of enhancing, see table below. |
| Fuse Gifts | Fusing multiple E.G.O Gifts to produce a new E.G.O Gift. | Free | Fusing multiple E.G.O Gifts of a low tier may produce a Gift of a higher tier. |
(*) Warning: By replacing skills, it's possible to make an Identity no longer fulfills the conditions of certain EGO gifts that it fulfilled before. Example 1: If an Identity has only Gloom on Skill 1 and it gets entirely replaced, it no longer fits the second effect of Curriculum Vitae. Example 2: Cinq Assoc. West Section 3 Meursault's Skill 3 "Salut" does not inflict
Rupture
RuptureThe next Y time(s) the unit is hit, take X fixed damage.. So if all his other Skills are replaced by it, he is no longer considered as an Identity having an Attack Skill that inflicts
Rupture
RuptureThe next Y time(s) the unit is hit, take X fixed damage..
Super Shops
Super Shops only appear on Floors cleared on Hard Mode, replacing Regular Shops with a chance tied to the amount of
Cost spent at previous Shops: the chance has a baseline of 3%, increasing by 1% per 20
Cost spent. It is inherited between Shop visits, only resetting when a Super Shop generates.
Compared to Regular Shops, Super Shops have the following modifications:
- +3 to the number of E.G.O Gifts displayed, bringing the baseline to 7 E.G.O Gifts per visit.
- 2 Sinner's Skills can be replaced, displaying as the Skill Replacement shop item being still available after the first Replacement is purchased.
- E.G.O Gift Fusion in Super Shops support up to 5 E.G.O Gifts being Fused.
Gift Enhance Costs
| Tier | Cost (Upgrade Level 1) | Cost (Upgrade Level 2) |
|---|---|---|
| I | 50 | 100 |
| II | 60 | 120 |
| III | 75 | 150 |
| IV | 100 | 200 |
Gift Fusion Details
The player first chooses a Keyword Category they would like to obtain from the Fusion. There are two kinds of fusions.
Recipe Fusions
Certain combinations (Recipes) of Gifts yield specific Gifts. These Gifts cannot be obtained from Shops, random Encounter rewards, or Fusion not conforming to the Recipe. For a list of Fusion Recipes, see E.G.O Gift Fusion Recipes.
Random Fusions
Any other fusion yields a random non-Recipe Gift. In addition to standard Gifts, random fusions can yield non-Recipe Gifts that are exclusive to the current floor theme.
Fusing more Gifts increases the chance of obtaining Gifts of the desired Keyword: 2-Gift Fusions have a 60% chance, 3-Gift Fusions have a 90% chance, and Fusions of 4+ Gifts have a 99% chance.
At each individual Fusion attempt, 5
Starlight may be spent to perform "Wishmaking", massively boosting the chances of obtaining an E.G.O Gift of the desired Keyword. With Wishmaking active, 2-Gift Fusions have a 90% chance, 3-Gift Fusions have a 99% chance, and 4+ Gift Fusions have a 99.99% chance of granting an E.G.O Gift of the desired Keyword.
Tier: EX |
A Certain Philosophy |
The Tier of result of the Fusion depends on the combined Tiers of the Gifts fused, utilizing a points system:
| Gift Tier | Fusion Points |
|---|---|
| I | 3 |
| II | 6 |
| III | 10 |
| IV | 15 |
| V | 30 |
| The Fusion Points from the Fused Gifts are added up, and the following is used to determine the Tier of the resultant Gift: | |
|---|---|
| Point Range | Resultant Gift Tier |
| ≤ 10 Points | I |
| 11~16 Points | II |
| 17~24 Points | III |
| ≥ 25 Points | IV |
| Rule of Thumb: Fusion Gift Tier=(sum of Fused E.G.O Gifts' Tiers / 2) (rounded down) | |
| Fusion in Super Shops have slightly different Point Ranges: | |
|---|---|
| Point Range | Resultant Gift Tier |
| ≤ 9 Points | I |
| 10~14 Points | II |
| 15~21 Points | III |
| ≥ 22 Points | IV |
E.G.O Gifts
There are a total of 319 E.G.O Gifts that you may encounter during a Mirror of Immortality run. In all difficulties, you will choose 1 Tier 2 E.G.O Gift from one of 10 Categories (1 for each Sin Affinity and Damage Type) (certain Starter Buffs increase the number of Starting E.G.O Gift Choices). The E.G.O Gifts offered in these categories are fixed (see Starting E.G.O Gift Choice).
Battle Encounters has a certain chance of letting you pick another upon beating them: 5% for Normal Encounters, 70% for Abnormality/Focused Encounters, 35% for Risky Encounters, and guaranteed for Boss Encounters. Boss Encounters offers you to pick 1 Gift out of 3 (on [NORMAL]) or 2 Gifts out of 4 (on [HARD]) while the rest only offers 1 choice of Gift. You can reject any E.G.O Gifts offered if they do not suit your current run.
Abnormality Encounters may also give you their relevant E.G.O Gift depending on the chosen decision. Gifts earned in this manner cannot be rejected.
A list of all E.G.O Gifts acquirable in the Mirror Dungeons can be found on this page.
Starting E.G.O Gift Choice
| Starting E.G.O Gifts | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Keyword | Gifts | ||||||||
Hellterfly's Dream |
Fiery Down |
Pain of Stifled Rage | |||||||
Wound Clerid |
Little and To-be-Naughty Plushie |
Awe | |||||||
Oscillating Bracelet |
Reverberation |
Sour Liquor Aroma | |||||||
Barbed Lasso |
Fluorescent Lamp |
Smoking Gunpowder | |||||||
Red Order |
Melted Spring |
Grandeur | |||||||
Cigarette Holder |
Stone Tomb |
Old Wooden Doll | |||||||
Employee Card |
Portable Battery Socket |
Patrolling Flashlight | |||||||
Dreaming Electric Sheep |
Short Cane Sword |
Resolution | |||||||
Gathering Skulls |
Plume of Proof |
Torn Bandolier | |||||||
Today’s Expression |
Pocket Flashcards |
Temporal Bridle | |||||||
E.G.O Gift Search
After obtaining the Starting E.G.O Gifts, up to 3 E.G.O Gifts of Tier III or lower of one's own choice may be obtained through E.G.O Gift Search at the cost of
Starlight.
| E.G.O Gift Amount | |
|---|---|
| 1 | 70 |
| 2 | 160 |
| 3 | 270 |
All E.G.O Gifts available in the Mirror Dungeon of Tier III and lower are available through this function, including Gifts unique to specific Theme Packs and undiscovered Gifts. However, Gifts obtained through duplication or Fixed Fusion recipes cannot be obtained through E.G.O Gift Search.
Parallel Superposition Mode (Infinity Mirror)
If all 5 Floors of a Mirror Dungeon was completed in [HARD] Mode and 'Parallel Superposition' is enabled, a popup asking whether the Manager will enter 'Parallel Superposition' Mode will appear after the Floor 5 boss was defeated. Confirming extends the Mirror Dungeon run to 10 Floors, with Floors 6~10 featuring much harder Mounting Trials than previous Floors.
Lunacy and Battle Pass EXP rewards does not increase beyond Floor 5, but more
Starlight and
Projection Rate may be gained through these Floors.
After completing Floor 10, another popup will appear asking whether the Manager will enter 'Parallel Superposition EXTREME' will appear. Confirming extends the Mirror Dungeon run to 15 Floors, with Floors 11~15 featuring unique Long Battle Theme Packs, highly difficult Mounting Trials, and Mounting Adversities that puts severe limitations on the Sinners. Large amounts of
Starlight and
Projection Rate may be earned through completing these Floors. Theme Pack Observation cannot be used in 'Parallel Superposition EXTREME'.
Mirror Dungeon EXTREME Bosses
In any non-Boss, non-Shop Node on a floor while in the Mirror Dungeon's EXTREME Mode, there is a 10% chance for the current node being replaced by an optional, hidden Boss Node. These bosses are highly powerful, and reward exclusive Tier IV E.G.O Gifts alongside 1000
Cost and fully healing all Sinners. Choosing to enter their Nodes will not allow one to forfeit the battle.
| Boss | Allies | Reward | ||
|---|---|---|---|---|
|
|
The Family's Resentment | |||
|
(2 Waves) |
Rules of the Middle | |||
For the Capo | ||||
| (N/A) |
Kkomi's Mini-Gift |
Achievements / Mirror Projection
Completing certain actions in Mirror Dungeons rewards Achievements, which in turn grants 'Projection Rate'. The Manager can claim rewards for every 100 Projection Rate (1 Reward Level), up to 100 Reward Levels.
In addition to completing Achievements, completing Mirror Dungeon runs also grant Projection Rate, with higher Floors granting more Projection Rate. However, a weekly cap of 1000 Projection Rate (10 Reward Levels) is present on earning Projection Rate through this method.
Achievements and their Rewards are renewed for each Season's Mirror Dungeon.
Abnormality Encounters
In Abnormality Encounters, a random Abnormality will appear, and the Manager will be prompted to make a choice between multiple actions. Abnormalities that appear in previous dungeons may appear in newer dungeons. Some choices can lead to a Focused Encounter. In addition to the rewards shown before the fight, you will also gain 75 (100 in Hard Mode) Cost like a normal Focused Encounter (Cost increasing E.G.O Gift and Starter Buff are also applied).
For an idea on what choices leads to what results, check their respective information page.
Trivia
- The name of the Parallel Superposition Mode is likely a reference to the arrangement of two mirrors facing each other in parallel, which creates infinite reflections.





