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Chaos Zero Nightmare (CZN)
Zero System Guide
NEW: Season 2: Seed of Karmic Fire
┗ Refinement | Arena
✪ Nine: Build | Combatant Guide | Banner
★ Alcea: Partner Guide | Banner
☆ See our Endgame Mode Tier List
★ Tier Lists: Character | Partner | Cards
Zero System is a separate game mode from Chaos Manifestation in Chaos Zero Nightmare (CZN) where players tackle harder versions of Chaos called Codex but with more rewards and higher save data values. Learn more about how Zero System works, tips, rewards, duration and how to unlock it here!
List of Contents
Zero System New Features
New Unique Codex Options
| Divine Intervention | Penalty | Divine Fate |
|---|---|---|
| Kyrken’s Oracle | At the end of the turn, if AP is remaining, increase Stress of allies by 2 | When using a card with Cost 2 or higher, gain 2 AP and Draw 1 card. |
| Diallos’s Glory | Increase Damage Amount taken by allies by 30% | Shield gain is increased by 200%. At the end of the turn, Retain Shield, and inflict Fixed Damage to all enemies equal to Shield owned. |
| Sekred’s Breath | Change Hit Count of all Attack Cards to 1 | Increase Damage Amount by 200% for each Hit decreased on an Attack Card. |
| Nihilum’s Gaze | When 4 Attack Cards are used, end turn. | Triple the Hit Count of Attack Cards. |
On Tier 15 difficulties which is a new difficulty tier added on the February 4 patch update, there will be a chance that the codex will obtain a mythic modifier that will include a divine intervention. Codice with Unique options will massively increase the rewards you get from that run at the cost of not being able to obtain save data.
Completing Unique Codex Unlocks Archive Entries
One additional reward you can get from unique codice are the unlocks for the archive section of Zero System. The Archive is a lore hub that also provides Crystals and Traces of Memory as unlock rewards.
Zero System Revamp
The Zero System upgrades will now be split into three categories. Overall, its best to obtain the Signal Duplication effect from Administrator Mode first to taget combatants for duplication then maxing out Authority Expansion to regain the quality of life upgrades for chaos runs such as Dellang Shop rerolls, free training zones, and the meditation feature.
Accessibility Permission Upgrades and Effects
| Tier | Upgrade | Effect | Cost |
|---|---|---|---|
| 1 | Basic Calculation Output | Increase Attack 8 per rank. | 20 |
| Logic Barrier Enhancement | Increase Attack 4 per rank. | ||
| System Integrity | Increase Attack 12 per rank. | ||
| 2 | Cognitive Flash | Increease Epiphany Chance by 1% per rank | 50 |
| Trade Guild Sponsor | Reduce equipment cost at Dellang Shop by 4% per rank. | ||
| 3 | Data Mining | Increase Credits gained from battle spots by 4% | 50 |
| Self-Repair Routine | Mental Breakdown recovery chance increased by 10% |
Accessibility Permission improves stats and difficulty mitigation features which includes increases Epiphany activiation rates, shop discounts, and credit acquisition.
Authority Expansion
| Tier | Upgrade | Effect | Cost |
|---|---|---|---|
| 1 | Unidentified Coordinate Call | When entering Chaos, increase the chance of encountering Divine Delegates by 100% | 60 |
| Parallel Processing Amp. | Increase Attack by 8 per rank. | 25 | |
| Multi-Layer Firewall Deployment | Increase Defense by 4 per rank. | ||
| Structural Integrity verification | Increase Health by 12 per rank. | ||
| 2 | Depths Scan | Increease Epiphany Chance by 1% per rank | 35 |
| Restock | Reduce equipment cost at Dellang Shop by 4% per rank. | 75 | |
| Self-Directed Learning | Use Training for Free at Safe Zones | 100 | |
| 3 | Greed Signal Detection | Upon entering a stage, increase the chance of an additional Aether-Eater event triggering in one particular Normal Battle Area by 1% per rank. | 60 |
| Hostile Signal Detection | Invasion Event Senectus appears more frequently. | 150 | |
| Cognitive Reconstruction | Unlock the Meditation function at Safe Zones. | 200 |
These upgrades will focus on RNG manipulation such as guaranteed divine representatives, rare unidentified area rates. It will also affect Operational Efficiency which includes the free Dellang Shop rerolls and training features. It also unlocks the new meditation feature that will let you reroll an epiphany for a price.
Administrator Mode
| Tier | Upgrade | Effect | Cost |
|---|---|---|---|
| 1 | Broadened Diplomatic Mandate | When encountering the Lion Divine Delegate, an additional option appears that gives a more powerful effect instead of receiving a penalty. | 100 |
| Calculation Overclock | Increase attack by 8 per rank. | 30 | |
| Firewall Encryption | Increase Defense by 4 per rank. | ||
| Nanoparticle Reconfiguration | Increase Health by 12 per rank. | ||
| 2 | Ascendant Revelation | Increase Divine Epiphany Chance by 3% perr rank. | 100 |
| Defense Code Deletion | During the Aether-Eater event, the Aether-Eater will no longer gain Shield. | 200 | |
| 3 | High-Density Information Extraction | Monster Card acquisition rate in Elite Area increases by 10% per rank. | 150 |
| Threat Removal Reward | Upon defeating Senectus in an Invasion event, decrease Stress of allies by 10. | 200 | |
| Identification Signal Duplication | Random Card Copy occurs as Selected Combatant Copy. | 300 |
Administrator Mode is the final upgrade and it grants stronger effects like a higher benefit from Divine Representatives, Aether-Eater shield removal, stress recovery after defeating Senectus, and selecting which combatant will be the target for card duplication.
Reset Skill Tree to Retain Unlocked Nodes
You can reset the Zero System upgrades after you unlock all of the unlockable parts of each Zero System skill tree. Once done, you won't need to level up all nodes to reach the higher tiers which will let you pick the upgrades you want without spending resources on upgrades you dont want to spend resources on yet.
Zero System Explained
|
|
Harder Chaos Manifestation
Zero System is the same as Chaos Manifestation but the game generates a chaos for you called Codex which has randomized penalties that makes the run harder instead of a static difficulty increase.
Exploration records are still counted after each run for that chaos and will give you the respective rewards for it. Therefore, it is better to play Zero System insead of Chaos Manifestation once you unlock it.
Higher Save Data Value
Zero System has a much higher save data value compared to Chaos Manifestation letting you save more powerful cards and equipments after a run.
Saved Data and Data Value Guide
Upgrades to Strengthen Future Runs
As you keep playing Zero System, you will earn a currency called Chaos Orbs. After each run, you can spend it on upgrades such as stat increase, event probability increase and powerful effects such as increase spawn rate of rare species or gain bonus effects at the start of all your runs.
Do note that upgrades in Zero System do not carry over in Chaos Manifestation.
Gain Rewards After Every Run
You also gain various rewards after reaching a level based on the accumulated chaos orbs you have obtained. Chaos Orbs you spent on upgrades will not reduce your level.
Zero System Tips
|
|
Start With the Easiest Codex
You start at difficulty level 5 after unlocking Zero System. This limits you to codex levels that range from 40 to 50. Completing a run will give you three similar chaos options with higher codex level than the previous one but never lower.
Pick Codex With Penalties That Least Affect Your Team
Before starting a run, make sure to pick a codex with penalties that has the least impact in your party. For example, if you have a dedicated healer like Mika, you can aim for the Anxiety penalty that disables the rest option in campfires which you do not need when she is in the party.
List of All Codex Penalties
| Penalty Name |
Description | Chaos Orb Increase |
|---|---|---|
| Tyrant 1 | Elite and Boss Area monsters' Attack and max Health increase by 10% | 10% |
| Tyrant 2 | Elite and Boss Area monsters' Attack and max Health increase by 20% | 20% |
| Tyrant 3 | Elite and Boss Area monsters' Attack and max Health increase by 30% | 30% |
| Tyrant 4 | Elite and Boss Area monsters' Attack and max Health increase by 40% | 40% |
| Elite 1 | 2 Elite Spots added | 10% |
| Elite 2 | 4 Elite Spots added | 20% |
| Elite 3 | 6 Elite Spots added | 30% |
| Elite 4 | 8 Elite Spots added | 40% |
| Plague 1 | Max Health decreases by 20% | 10% |
| Plague 2 | Max Health decreases by 30% | 20% |
| Plague 3 | Max Health decreases by 40% | 30% |
| Plague 4 | Max Health decreases by 50% | 40% |
| Loss 1 | Credits obtained from battle spots decrease by 20% | 10% |
| Loss 2 | Credits obtained from battle spots decrease by 40% | 20% |
| Loss 3 | Credits obtained from battle spots decrease by 60% | 30% |
| Loss 4 | Credits obtained from battle spots decrease by 80% | 40% |
| Gangrene 1 | Max Health decreases by 1% at the start of each turn | 10% |
| Gangrene 2 | Max Health decreases by 2% at the start of each turn | 20% |
| Gangrene 3 | Max Health decreases by 3% at the start of each turn | 30% |
| Rage 1 | Monsters gain 1 fury every 3 turns | 10% |
| Rage 2 | Monsters gain 2 fury every 3 turns | 20% |
| Harden 1 | Monsters gain 1 resolve every 3 turns | 20% |
| Harden 2 | Monsters gain 2 resolve every 3 turns | 40% |
| Revenge 1 | Each time a monster dies, other monsters gain 1 fury | 10% |
| Revenge 2 | Each time a monster dies, other monsters gain 2 fury | 20% |
| Neglect 1 | Discard 1 card randomly at the start of each turn | 50% |
| Anxiety 1 | Cannot rest in safe zones | 50% |
When creating a codex, it has a chance of having 1-3 penalties based on rarity with uncommon having 1 penalty and legendary with 3 penalties in total. Each penalty has an equal chance of 3.7037% to show up in a codex.
Fight Rare Species For More Chaos Orbs
When looking at the map, you will notice battle nodes that has a purple flaming icon beside it. The enemies are considered rare species that has a bit higher health and attack plus an extra passive that buffs the enemy or debuffs your party. If you complete the fight, you will be rewarded with more chaos orbs at the end of your run.
Use Chaos Orbs For Upgrades After a Run
Make sure to spend all chaos orbs you obtained after a successful run on upgrades to get powerful effects. For example, you can get an upgrade that puts you in an event at the start of all your runs that provides beneficial effects on your team such as increase max health, card removal or random equipment.
Zero System Rewards
Crystals, Prism Lens and Various Growth Materials
| Total Rewards | |
|---|---|
 Unit
x960000 Prism Lens
x18 Crystals
x320 |
|
| Level | Rewards | Requirement |
|---|---|---|
| 1 | Unit x80000 | Chaos Orbs x15 |
| 2 | Prism Lens x1 | Chaos Orbs x15 |
| 3 | Chaos Orbs x15 | |
| 4 | Chaos Orbs x15 | |
| 5 | Prism Lens x1 | Chaos Orbs x15 |
| 6 | Unit x80000 | Chaos Orbs x15 |
| 7 | Chaos Orbs x15 | |
| 8 | Chaos Orbs x15 | |
| 9 | Prism Lens x1 | Chaos Orbs x15 |
| 10 | Crystals x80 | Chaos Orbs x15 |
Zero System Chaos Matrix Duration
Ends on January 14, 2026 at 02:00 AM (UTC)
Chaos Matrix, is a seasonal event for Zero System where players collect Chaos Orbs to raise their Chaos Matrix Level to earn rewards. It starts on October 22, 2025 and ends on January 14, 2026 for a total of 84 days.
How to Unlock Zero System
Unlocked on Captain Level 40
Zero System becomes available after reaching Captain Level 40, Expert Captain. Once you reach this level, the game will force you to a tutorial for Zero System. Simply go back to the main menu, click Chaos on the right side of the screen and select Zero System beside Chaos Manifestation.
Chaos Zero Nightmare (CZN) Related Guides
Chaos Game Modes
| Chaos Manifestation | Zero System |
All Chaos Areas
| The Blue Pot | Twin Star's Shadow |
| City of Mist | Swamp of Judgement |
| The Foretold Ruin | Laboratory 0 |
All Seasonal Chaos Areas
| Burning Life |
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