Laboratory 0 Guide - Seasonal Chaos Boss and Rewards

Laboratory 0 guide for Chaos Zero Nightmare (CZN). Includes Laboratory 0 walkthrough, best characters, boss builds, elite battles, events, equipment, farming tips, and more in CZN.

Laboratory 0 Updates

Changed to a Codex-Exclusive Chaos

Lab 0 has been changed to a Codex-exclusive Chaos. It will be added to the [Codex] after the Seasonal Chaos event period ends, and you can create Save Data as usual.

Appears by Turning Off Galactic Disaster

Lab 0 will . Be careful, as it will not appear on the selection screen when the toggle button is "On".

Laboratory 0 Chaos Features

Lots of Draw-Related Equipment

In Lab 0, a lot of Draw-related equipment drops. Therefore, it is particularly compatible with Combatants who utilize draw effects in their strategy.

Recommended Draw-related Equipment

Equipment	Skill
W-52 "Dopamine Injector"	Weapon When drawing a card with an ability, increases damage dealt by 20% for 1 turn (2 times per turn).
Rocket-Adorned Cape	Armor At the start of battle, gain 1 stack of Damage Reduction and draw 1 card.
Replica Core	Weapon When drawing this unit's Attack Card with an ability, its damage is increased by 50% for 1 turn.
Chimeranite	Weapon When drawing a card with an ability, increases the damage of this unit's Attack Cards by 35% for 1 turn (1 time per turn).

Also has Equipment with Offense Skills

Lab 0 also has a wealth of equipment with offensive skills, making it suitable for creating Save Data for Attackers in general.

Best Equipment with Offensive Skills

Equipment	Skill
Eye of the Eyeless	Trinket Increases damage of basic Attack Cards by 40%.
Blood Giant Claw	Weapon On Ravage, deal 150% fixed damage to the target.
Mark of a Superior Specimen	Trinket Damage dealt +30% Change Stress taken to 0 (once per battle)
Misty Crystal Ball	Weapon Increases damage of 0-Cost Attack Cards by 40%.

Laboratory 0 Best Characters

Best for Draw and 0-Cost Card Units

Best Characters for Save Data
Yuki	Mei Lin	Sereniel

The combination of equipment that can enhance damage via draw, grant Shields, and Upgrade 0-Cost Cards is powerful. Among these, the synergy with Yuki's draw-related equipment and a strategy that Upgrades Mei Lin's and Sereniel's 0-Cost Cards are recommended.

Recommended for All Combatants

It is also generally recommended for Combatants other than those listed above. Simple damage increases and draw effects are highly versatile and are generally compatible with any Combatant, expanding your strategic options.

Laboratory 0 Best Team Builds

Recommended Characters

Save Data Character	Character 1	Character 2
Training Slot	Veronica	Mika

In Lab 0, enemies weak to Passion and Void appear in roughly equal numbers, so it's recommended to include an Attacker for either weakness. In boss battles, a strategy of hitting multiple times is effective, so including Mika, who can secure AP, will stabilize your run.

Character 1 Character Replacement

Alternative Character	Reason
Chizuru	Void Attacker - Can easily rack up a high Hit Count and contribute in boss battles - Can lower the Card Cost for other Combatants with "Bound At Dusk" - Note that Chizuru cannot receive Mika's AP supply
Selena	Passion Attacker - Contributes to damage with Extra Attacks from Mark - Also has plenty of AoE Attack options
Tressa	Void Attacker - Features damage-over-time from Agony - Has many low-Cost Cards, making it easy to rack up a high Hit Count

For the accompanying sub-Attacker, it's recommended to use a Combatant with high draw performance or one that can easily rack up a high Hit Count. They synergize well with the boss battle mechanics, making runs more stable.

Character 2 Character Replacement

Alternative Character	Reason
Narja	Instinct Supporter - A supporter who can both buff and heal - It is possible for her to also act as an attacker, but since it's not a Weak Attribute, it is better to focus on support
Rei	Void Supporter - A supporter with plenty of buff Cards - She also has a 0-cost draw Card - At 2 Manifest Ego, she can also contribute as a healer
Nia	Instinct Supporter - A supporter who can use draw-type skills at a low Cost - She can handle both deck cycling and healing - An option if you have enough damage

Each character has a different role, so please choose according to what your team is lacking. It is recommended to adopt support that addresses the party's challenges, such as improving hand rotation or securing durability with Shields.

Laboratory 0 Boss Information

Family Head

Family Head (Outskirts)

[Weak Attributes] Void [Features] - Gains Hunger at the start of every turn - Uses a powerful Attack when a certain amount of HP is lost

Family Head is the boss of the first stage (Outskirts) of Lab 0. It gains Hunger, which increases its damage dealt, at the start of each turn, and you can reduce Hunger by 1 each time you land an Attack.

Sweet Dream

Sweet Dream (Interior)

[Weak Attributes] Void [Features] - Absorbs a random Card at the start of the turn - You can retrieve the Card by hitting it multiple times

After defeating the Family Head on the first stage, you can proceed to the Core. The Core boss, Sweet Dream, absorbs Cards. The absorbed Cards can be retrieved by attacking the opponent, so a team that can rack up a high number of attacks is recommended.

Laboratory 0 Dimensional Tunnel

A Special Event that Occurs in Lab 0

Within Lab 0, special limited-time Events also occur. Depending on the Event, you may be able to obtain powerful Cards called Forbidden Cards.

Can be Confirmed on the Map

The event nodes that lead to the Dimensional Tunnel can be seen on the map. Unless you have a specific reason not to, such as healing in a Safe Zone, it is recommended to prioritize these nodes.

Obtain Forbidden Cards

You can obtain Forbidden Cards in special events within the Dimensional Tunnel. Depending on the Combatant, these can significantly Upgrade your Save Data, so be sure to visit them actively.

Dimensional Tunnel Also In Other Chaos

Forbidden Catalyst has been added to the unique options, so it is possible to enter in other Chaos dungeons.

Laboratory 0 Events List

Explorer of the Void 1

Selecting [Answer to the Question]

Explorer of the Void 2

Selecting [Answer to the Question]

Explorer of the Void 3

Selecting [Answer to the Question]

Event Quick Look
Guardian of the Boundary 1	Guardian of the Boundary 2
Self-Encroachment 1	Self-Encroachment 2
Echoing Canyon	Cleaner of Peltion 1
Cleaner of Peltion 2	Remnants of Failure 1
Remnants of Failure 2	Emergency Broadcast System
Manager's Record 1	Manager's Record 2
Manager's Record 3	A Mouthful
Memorandum 1	Memorandum 2
Memorandum 3	Meal Time
Memory Storage	Explorer of the Void 1
Explorer of the Void 2	Explorer of the Void 3
Display of Tragedy	Failed Replica 1
Failed Replica 2	Projection of Desire
Logic Error 1	Logic Error 2
Heart of the Ore Vein 1	Heart of the Ore Vein 2
Dimensional Tunnel	A Child Locked in a Room
Researcher's Agony	Proof of Existence
Imprint of Agony	Stagnant Time
Call of the Void	Record of a Toast
Demise Gate

Guardian of the Boundary 1

Choice	Effect
[Analyze] Disable the turret	Dice Roll 7 Success: Obtain random Rare-Legendary equipment Failure: HP -20%
Retrieve parts	Credit +80
Completely destroy it	Obtain Equipment [Neural Hacking Module] [Neural Hacking Module Performance] Trinket When an ally uses a Forbidden Card, Damage Dealt +20%, Shield Gained +20% (Twice per battle)

*The equipment obtained from the choice 'Completely destroy it' may be different each time.

Guardian of the Boundary 2

Choice	Effect
Attack the monster	Dice Roll 6 Success: Gain 2 stacks of the [Temporary Alliance] buff Failure: Trigger battle [Weakened Monster], then obtain a random Rare equipment
Let them fight	Dice Roll 6 Success: Choose 1 of 10 random Common Cards Failure: Trigger battle [Weakened Monster]
Search the area	Credit +80
Battle	Gain 2 stacks of the [Temporary Alliance] buff

Self-Encroachment 1

Choice	Effect
Attack the monster	Credit +80
[Analyze] Observe its behavior	Dice Roll 11 Success: Choose 1 of 10 random Common Cards Failure: Trigger battle, then choose 1 of 3 random Common Cards
Throw some bait	Remove 1 selected Card
Battle	Obtain random Rare equipment

Self-Encroachment 2

Choice	Effect
Attack the monster	Credit +120
[Analysis] Observe its behavior	Dice Roll 8 Success: Choose 1 of 3 random Rare Cards Failure: Trigger battle, then choose 1 of 3 random Common Cards
Throw some bait	Remove 1 selected Card
Battle	Obtain random Rare equipment

Echoing Canyon

Choice	Effect
Endure the echo	All Combatants' Stress +5, selected Combatant gets 1 Epiphany
[Insight] Face the truth	Dice Roll 7 Success: Selected Combatant gets 1 Epiphany Failure: Forced to obtain curse Card [Schizophrenia], a random Combatant gets 1 Epiphany [Schizophrenia Performance] Cost 1 [Exhaust] If in hand at end of turn, take 2% of max HP as damage, or a random Combatant's Stress increases by 3
Mourn the tragedy	All Combatants' Stress -6

Cleaner of Peltion 1

Choice	Effect
Ask its true purpose	Confirm Info [His Purpose]
It's for the development of mankind	Obtain Equipment [Administrator ID Card] [Administrator ID Card Performance] Trinket At start of battle, Evasion 1
They crossed a line	A random Combatant gets 1 Epiphany
Battle	Obtain Equipment [Administrator ID Card] [Administrator ID Card Performance] Trinket At start of battle, Evasion 1

Cleaner of Peltion 2

Choice	Effect
Ask what kind of information it is	Confirm Info [Encrypted Information]
Demand the information	Obtain Equipment [Administrator ID Card] [Administrator ID Card Performance] Trinket At start of battle, Evasion 1
Propose a deal	Credit +100
Battle	Obtain Equipment [Administrator ID Card] [Administrator ID Card Performance] Trinket At start of battle, Evasion 1

Remnants of Failure 1

Choice	Effect
Open the cargo bay	Dice Roll 10 Success: Credit +140 Failure: HP -20%, Credit +60
Restore the recording device	Dice Roll 8 Success: Choose 1 of 10 random Common to Rare Cards Failure: Choose 1 of 3 random Common to Rare Cards
Search the wreckage	Credit +80

Remnants of Failure 2

Choice	Effect
[Dexterous] Collect a biological sample	Dice Roll 11 Success: Convert a selected Card into Card [Mutant Sample] Failure: All Combatants' Stress +5, obtain Card [Mutant Sample] [Mutant Sample Performance] Unplayable [retain/Remove] When this Card is in your hand, damage is increased by 20% in battles with Mutants
Incinerate the corpse	A random Combatant gets 1 Epiphany
Get some scrap metal	Obtain random Rare-Legendary equipment

Emergency Broadcast System

Choice	Effect
[Dexterous] Hack the system	Dice Roll 8 Success: Gain 1 stack of the [Beneficial Information] buff Failure: Gain 2 stacks of the [Spread of Madness] debuff
Turn off the power	A random Combatant gets 1 Epiphany
Check the supply source	Obtain random Rare-Legendary equipment

Manager's Record 1

Choice	Effect
Request an explanation	Confirm Info [Reason for Hostility]
Rebut the claim	Obtain random Rare-Legendary equipment
Cheer on the robot	Credit +100

Manager's Record 2

Choice	Effect
Request an explanation	Confirm Info [HA Series]
Remove the data chip	Choose 1 of 3 random Common Rare Cards
Tell it the truth	Obtain random Rare-Legendary equipment

Manager's Record 3

Choice	Effect
Look for the record	Confirm Info [The Last Record]
[Analyze] Look for a hidden record	Dice Roll 8 Success: Selected Combatant gets 1 Epiphany Failure: All Combatants' Stress +5, a random Combatant gets 1 Epiphany
Break the robot	All Combatants' Stress -3

A Mouthful

Choice	Effect
Suppress the fear	Selected Combatant gets 1 Epiphany
Record the phenomenon	Dice Roll 8 Success: Choose 1 of 3 random Rare to Legendary Cards Failure: Forced to obtain the curse Card [Schizophrenia], then choose 1 of 3 random Rare Cards [Schizophrenia Performance] Cost 1 [Exhaust] If in hand at end of turn, take 2% of max HP as damage, or a random Combatant's Stress increases by 3
Accept the Void	Remove 2 selected Cards

Memorandum 1

Choice	Effect
Hand over the research data	All Combatants' Stress +5, then choose 1 of 3 random Rare to Legendary Cards
Hand over the family photo	Dice Roll 10 Success: Obtain Equipment [Rocket-Embellished Cape] Failure: Obtain random Rare equipment [Rocket-Embellished Cape Performance] Armor At start of battle, Damage Reduction 1, Draw 1
Exhaust the soul	1 random Card gets Epiphany

Memorandum 2

Choice	Effect
Watch over its final moments	All Combatants' Stress -6
Grasp the memory	All Combatants' Stress +10, obtain Equipment [Wings of Freedom] [Wings of Freedom Performance] Armor When taking an Attack, damage dealt +10% (stacks up to 3 times)
Touch the remaining core	Max HP +15%

Memorandum 3

Under investigation. Will be updated as soon as confirmed.

Meal Time

Choice	Effect
Start the test	Trigger Event [Combat Test]
Hold up your ID card	Choose 1 of 10 random Rare to Legendary Cards
Refuse the test	End Event

Selecting [Combat Test]

Choice	Effect
Standard Combat Test	Trigger battle [Standard Specimen], Credit +100
Advanced Combat Test	Trigger battle [Advanced Specimen], Credit +150
Special Specimen Combat Test	Trigger battle [Special Specimen], obtain Equipment [Mark of a Superior Specimen] [Mark of a Superior Specimen Performance] Trinket Damage dealt +30% Change Stress taken to 0 (once per battle)

Memory Storage

Choice	Effect
Last record of the head researcher	Dice Roll 5 Success: Choose 1 of 3 random Rare Cards, then repeat the Event Failure: HP -20%
Test subject observation log	Dice Roll 7 Success: Choose 1 of 3 random Rare to Legendary Cards, then repeat the Event Failure: HP -20%
Lode synchronization experiment footage	Dice Roll 9 Success: Choose 1 of 10 random Rare to Legendary Cards, then repeat the Event Failure: HP -20%

Display of Tragedy

Choice	Effect
Analyze the culture tube	Confirm Info [Test Subject's Record]
Attempt to make contact	Obtain Card [Hyper Regeneration] [Hyper Regeneration Performance] Cost 1 [Exhaust] Heal 300% at the start of the next turn Gain Vulnerable 1
Extract the core	Dice Roll 12 Success: Obtain Equipment [Replica Core] Failure: Trigger battle [Mutated Being], obtain Equipment [Replica Core] [Replica Core Performance] Weapon When drawing your own Attack Card with a skill, that Card's damage is increased by +50% for 1 turn.

Failed Replica 1

Choice	Effect
End its agony	Obtain Equipment [RFS-17] [RFS-17 Performance] Weapon Crit chance of 0-Cost Attack Cards +10%
Administer a painkiller	Dice Roll 7 Success: All Combatants' Stress -9 Failure: All Combatants' Stress -3
Collect a sample	Choose 1 of 3 random Common Rare Cards
Battle	Obtain random Legendary equipment

*The equipment obtained from the choice 'End its Agony' may be different each time.

Failed Replica 2

Choice	Effect
Wake it up	Trigger Event [Awakened Original]
[Dexterous] Collect a sample	Dice Roll 8 Success: Choose 1 of 10 random Rare to Legendary Cards Failure: Trigger battle [Awakened Replica], then choose 1 of 10 random Rare to Legendary Cards
Launch a surprise attack	Trigger battle, obtain Equipment [Mutant Energy Waves Amplifier] [Mutant Energy Waves Amplifier Performance] Weapon When drawing a debuff or curse Card, damage dealt +12% for 1 turn
Battle	Obtain random Legendary equipment

*The equipment obtained from the choice 'Launch a surprise Attack' may be different each time.

Projection of Desire

Choice	Effect
See the potential for evolution	All Combatants' Stress -6
See the first sacrifice	Choose 1 of 3 random Rare to Legendary Cards
See the birth of the forbidden	All Combatants' Stress +5, 1 random Card gets Nihilum Epiphany

Logic Error 1

Choice	Effect
"Maintaining secrecy" is the top priority	Obtain Equipment [Root of the Forbidden] [Root of the Forbidden Performance] Trinket When taking an Attack, inflict the attacker with either Vulnerable, Weaken, or Impair at random (3 times per turn)
"Warning of danger" is the top priority	Gain 1 stack of the [Suppression of Activated Threat] buff
Destroy the AI	Credit +160

Logic Error 2

Choice	Effect
"Preserving research" is the top priority	Obtain Equipment [Root of the Forbidden] [Root of the Forbidden Performance] Trinket When taking an Attack, inflict the attacker with either Vulnerable, Weaken, or Impair at random (3 times per turn)
"Contributing to humanity" is the top priority	Gain 1 stack of the [Elimination of Dangerous Elements] buff
Destroy the AI	Credit +160

Heart of the Ore Vein 1

Choice	Effect
Stabilize the lode	Obtain Equipment [Chimeranite] [Chimeranite Performance] Weapon When drawing with a skill, increase the damage of your own Attack Cards by 35% for 1 turn (once per turn).
Accept the power	1 selected Card gets Nihilum Epiphany
Shake off the temptation	Forced to obtain 2 curse Cards [Schizophrenia], copy 1 selected Card (including Forbidden Cards) [Schizophrenia Performance] Cost 1 [Exhaust] If in hand at end of turn, take 2% of max HP as damage, or a random Combatant's Stress increases by 3

Heart of the Ore Vein 2

Choice	Effect
[Analyze] Collect a fragment	Dice Roll 12 Success: Obtain Equipment [Chimeranite] Failure: All Combatants' Stress +15, obtain Equipment [Chimeranite] [Chimeranite Performance] Weapon When drawing with a skill, increase the damage of your own Attack Cards by 35% for 1 turn (once per turn).
Analyze the lode	All Combatants' Stress +5, 1 random Card gets Nihilum Epiphany
Watch over its final moments	Copy 1 of 3 random Rare or higher Cards

Dimensional Tunnel

Choice	Effect
Make contact	Enter Dimensional Tunnel [??'s Mindscape]
Pass by	End Event

A Child Locked in a Room

Under investigation. Will be updated as soon as confirmed.

Researcher's Agony

Choice	Effect
Side with the ruthless researcher	1 random Card gets Nihilum Epiphany, gain 2 stacks of the [Memory Erosion] debuff
Side with the kind researcher	A random Combatant gets 1 Epiphany
Postpone the choice	Trigger Event [???], gain 1 stack of the [Memory Erosion] debuff

Proof of Existence

Choice	Effect
You must seek "Freedom"	1 random Card gets Nihilum Epiphany, gain 2 stacks of the [Memory Erosion] debuff
You must become a "Weapon"	1 selected Card gets Epiphany, gain 1 stack of the [Memory Erosion] debuff
You must become "Void"	Trigger Event [???], gain 1 stack of the [Memory Erosion] debuff

Imprint of Agony

Choice	Effect
Inject more energy	Credit +200, gain 2 stacks of the [Memory Erosion] debuff
Cut the connection	Credit +100, gain 1 stack of the [Memory Erosion] debuff
Watch from the sidelines	Trigger Event [???], gain 1 stack of the [Memory Erosion] debuff

Stagnant Time

Choice	Effect
Project "Struggle" into its consciousness	Selected Combatant gets 1 Epiphany, gain 1 stack of the [Memory Erosion] debuff
Project "Peace" into its consciousness	A random Combatant gets 1 Epiphany

Call of the Void

Choice	Effect
Accept the Void	1 random Card gets Nihilum Epiphany, gain 1 stack of the [Memory Erosion] debuff
Resonate with Fury	1 selected Card gets Nihilum Epiphany, gain 2 stacks of the [Memory Erosion] debuff
Accept the Void	Trigger Event [???], gain 1 stack of the [Memory Erosion] debuff

Record of a Toast

Choice	Effect
The one on the left [↓]	Choose 1 of 3 random Legendary Cards
The one in the center [↓]	1 random Card gets Nihilum Epiphany or Credit +80
The one on the right [↓]	Credit +100
Eavesdrop on the conversation	Confirm Info [Reason for Cheers]
Leave the dimension	Exit Dimensional Tunnel

Demise Gate

Choice	Effect
You will obtain all power	1 random Card gets Nihilum Epiphany
You will liberate everything	Obtain Destiny [Liberation] [Liberation's Effect] At the start of battle, create two Attack Card Ambushes.
You will end everything	Obtain Destiny [Termination] [Termination's Effect] Reduces your draw at the start of your turn by 1. At the start of your turn, draw 1 Attack Card and increase its damage by 20% until it's used.

Chaos Zero Nightmare Related Guides

Galactic Disaster Season

Galactic Disaster	The Great Rift
Nebula Distortion	Memory Encroachment

Beginner Tips

Early Game Guide	Daily Tasks
Recommended Gacha Banner	Ark City Guide
Card Epiphany Activation	How to Use Ego Skill
Stress Management	Weakness Attribute Guide
Safe Zone Guide	How to Restore Aether
How to Raise Captain Grade	ID Card Settings
Battle Pass (Arkhianon Supply) Guide & Should You Buy?	Simulation Guide
Twin Star's Shadow Guide	How to Download & Sync Data
Deep Trauma Guide	Latest Updates
Intermediate Captain Promotion Guide	Unigram Guide
Judas Boss Guide	-

Character Enhancement Guides

Character Enhancement Guide	How to Set and Upgrade Partner
How to Upgrade Potential	How to Use Save Data
How to Upgrade Manifest Ego	Memory Fragments
Prism Modules	Daily Reset Time
Zero System	Counseling Guide
Omega Codes	Redeem Codes
Zero System Guide	Basin of Hyperspace Guide
Affinity Guide	Environment Variables