Chaos Zero Nightmare Combat System and Strategy Guide
2025-11-04
Mastering the Chaos Zero Nightmare combat system is the key to winning intense battles. This guide will help you understand how the card-based and turn-based mechanics work, from building the best decks to using advanced strategies and learn how to counter enemies, break their defenses, and form the perfect team setup for every mission.
Table of Contents

Of course, knowing the mechanics is only half the fight, you’ll also need a strong team. That’s where OSLink can give you an edge. It lets you level up multiple accounts at once, making rerolling for top heroes faster and easier, so you can start your journey with a powerful lineup ready for victory. Let’s dive in and master the Chaos Zero Nightmare combat system together!
Chaos Zero Nightmare Combat System Mechanics
As a Chaos Zero Nightmare beginner, it’s important to understand how the combat system works. The game uses a turn-based, card-based battle system, so every move in combat is made through cards. Let’s break down the basic mechanics step by step.
Your Turn
Since the game is turn-based, you always start first with using your cards. Here’s how the card system works:

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You begin with a deck of 5 cards, with hold up to 10 cards maximum for your hand.
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You can draw a new set of cards from your draw pile.
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Each card represents a character’s action, such as attacks, buffs, or debuffs.
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To play cards, you need Action Points (AP).
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You get 3 AP per turn, and each card costs a certain amount of AP to use.
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Once your turn ends, unused cards are added to the Graveyard (disposal), and you draw new ones for the next round again with 3 AP.
 
Enemy Turn
After your turn, it’s time for the enemy to attack.

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Each enemy has a unique action count, which decreases by 1 every time your combatants use a card.
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When their action count reaches zero, the enemy takes their turn to attack.
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This continues in turns until either your team or the enemy team is defeated.
 
Health Bar and Stress System
Your team shares a single HP bar, instead of each character having their own.

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There’s also a stress meter that builds up during combat.
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If stress becomes too high, your characters can break down, causing a big drop in HP.
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So, it’s important to manage stress carefully during battles.
 
Now that you know the basic combat mechanics, you can move on to learning about battle features and combat strategies to perform better in fights.
Build Your Best Card Deck
Before a battle, you can customize your card deck, which can greatly improve your chances of winning. Here’s the deck building tips:

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Choose 4 starting cards that appear at the beginning of combat.
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Select 4 unique cards for each character to complete your deck.
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Pick cards with lower AP costs so you can play more moves each turn.
 
Strategy: Fill your deck with the most useful cards and maintain a balanced mix of attacks, support, and upgrades to perform well in battles.
Understand Card Types Before Use Them
Each card type has unique functions in Chaos Zero Nightmare combat system. Here is the breakdown:
| 
 Card Type  | 
 Function  | 
| 
 Attack Cards  | 
 Deal direct damage to enemies, a single target or multiple hits.  | 
| 
 Skill Cards  | 
 Provide special effects like shields, healing, buffs, or even extra AP to draw more cards.  | 
| 
 Upgrade Cards  | 
 Permanently permanent buffs during the battle.  | 
| 
 Curse Cards  | 
 Negative effects added by enemies or events like bleeding effects. Remove or cast them quickly.  | 
| 
 Status Cards  | 
 Neutral cards that may give small advantages or minor debuffs.  | 
Get Advantage from Other Combat Mechanics
The Chaos Zero Nightmare combat system includes advanced features like Ego Skills, Epiphany, Stress Management, and the Proto Skill. Mastering these mechanics helps you face tougher enemies easily. So, let’s take a look for the key features:
Use Your Ego Skills Smartly
Ego Skills are powerful ultimate abilities that can change the course of battle. You can use up to 6 Ego Skills per fight. Each character has 3 unique Ego Skills, and each partner adds 3 more. These skills use Ego Points (EP), shown on the left side of the screen. You gain EP by spending AP, defeating enemies, or as turns progress.

Strategy: Save Ego Skills for critical moments, like when your HP is low or against strong, high-HP enemies to deal massive damage and turn the fight in your favor.
Enhance Your Cards with Epiphany Mechanic
When a card glows with a small spark during the battle, it means it can trigger an Epiphany when played. So, what happens with Epiphany:

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You obtain one of the combatant’s unique cards, and its cost becomes 0 AP for one turn.
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You’ll also be offered three enhancement options to choose from, transforming the card into a more powerful version.
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Additionally, using epiphany cards in specific orders or combinations can create synergies, granting extra effects like increased ATK and enhanced healing or supports.
 
Strategy: Always watch which cards you evolve and focus on creating synergies with the cards in your deck and those of your teammates to make your attacks more powerful.
Reduce Stress of the Combatants
Each combatant has a Stress Meter that increases when they take damage or when a turn ends without healing or blocking. If the stress bar becomes full, the character enters a Mental Breakdown state.

During Breakdown:
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Normal cards are replaced with Break Cards.
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Ego Skills are disabled.
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Max HP is reduced, and when one character breaks down, you lose 1/3 of your total HP.
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If all three characters break down, it results in a Game Over.
 
How to Recover:
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Play through five Break Cards to recover from the Breakdown state.
 
Strategy: Use blocking and healing cards wisely to lower stress and maintain their performance in battle.
Undo Your Moves with Proto Skill
The Proto Skill is a special feature in Chaos Zero Nightmare that lets you undo your moves and fix mistakes during battle. You can find its hourglass icon at the bottom right corner of the screen. Here’s how it works:

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You can use it three times per day.
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It has three main abilities: Undo a card cast, Rewind a full turn or Redraw Ego Skills.
 
Strategy: This skill is perfect for correcting mistakes without restarting the battle. Use it wisely, especially in critical moments, like preventing fatal damage or saving important combatants during tough turns.
Face Monsters Effectively
To win easily, you need to understand how they act and how to counter them wisely.
Understand Enemy Actions
Before an enemy’s turn, you can see a small action icon above them. This shows what they’ll do next. These icons represent three main actions: Powerful Attack, Consecutive Strikes or Defensive Shield. Give attention to these icons to predict their next move and adjust your strategy.

Get the Elemental Advantage
Each card in your deck has a special attribute: Passion, Void, Instinct, Order, or Justice. Monsters also have their own attributes, and some are weak to specific ones.

Break the Enemy’s Tenacity Gauge
Some strong monsters have a Tenacity Gauge, which works like a shield. Here’s how to break it:

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Attack them using their weakness attribute or high AP cost cards.
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When the gauge hits zero, the monster enters a Breakthrough State.
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In this state, the enemy becomes stunned, giving you a perfect chance to deal heavy damage.
 
So build your deck with cards that match the enemy’s weakness attributes and time your Breakthrough attacks wisely to deal massive damage and defeat monsters faster.
Build a Perfect Team for Battles
Another great way to improve your Chaos Zero Nightmare combat performance is by building a balanced and powerful team. These are the team building tips:
Create a Strong Team Setup
A good team should have three combatants with different roles:

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DPS (Main Attacker): Deals heavy damage to enemies with strong attack cards.
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Sub DPS or Tank: Increases team defense and protects allies with defensive cards, like Khalipe.
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Supporter: Heals teammates, provides buffs, and applies debuffs to enemies for better survivability, like Mica.
 
But, getting top tier Chaos Zero Nightmare characters from the Rescue System (Gacha) can be difficult because of low drop rates. However, you can use the OSLink and its features like Multi-Instance and Synchronizer tools to create multiple accounts and reroll from all of them easily to increase your chances of obtaining high-rarity combatants.

Combine Combatants with the Best Partner
Partners in Chaos Zero Nightmare act like weapons, but they must be matched properly with your combatants to create the best synergy and improve battle performance.

Conclusion
These are all the important things you need to know about the Chaos Zero Nightmare combat system. Master each feature and apply the strategies to win battles more effectively. For smoother gameplay, use OSLink to run the game on your PC and play seamlessly on your mobile remotely. You can also use its features to build stronger teams by acquiring higher-rarity characters, increasing your chances of winning more battles.

