Apply Damage Buffs to High-Value Cards
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Chaos Zero Nightmare (CZN)
Rei Best Team and Build
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This is a guide for the best teams and loadout for Rei in Chaos Zero Nightmare (CZN). Learn which combatants are best to pair with Rei, as well as recommended cards, partners, and equipment.
| Rei Guides | |
|---|---|
| Team and Build | Cards and Materials |
List of Contents
Best Rei Build
Build Overview
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|---|---|---|---|---|---|---|---|---|---|---|---|
 Summary |
 Best Team |
 Best Cards |
 Best Partner |
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 Memory Fragment |
 Equipment |
 Playstyle |
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| Party List | ||
|---|---|---|
 Rin
|
 Mika
|
 Rei
|
 Can deal high burst damage Easy card pulls due to deck thinning with exhaust  Requires multiple buffs to truly reach efficient DPS. |
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The Blackhole Kayron build works through Mika and Rei acting as supports to mitigate teh AP cost of setups and further buff the insane damage that Kayron can deal. The build can deal high burst damage and has easy card pull, with the only downside is that the setups may require a few turns before completion.
Build Changelog
| Date | Changes |
|---|---|
| 11-07-2025 | ・Added Rei build overview
・Revised Rei build page layout |
| 10-26-2025 | ・Combined the 1-cost build and AoE burst into one viable setup.
・Updated recommended cards and playstyle. |
Rei Best Team
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|---|---|---|---|---|---|---|---|---|---|---|---|
| Summary |
Best Team |
Best Cards |
Best Partner |
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| Memory Fragment |
Equipment |
Playstyle |
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| Main DPS | Support |
|---|---|
|
Rin
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Mika
|
The best team for Rei consists of Rin and MIka, who act as the Main DPS and Support, enabling her role as an Attack Buffer for the team. This allows Rei to buff most of Renoa's 1-cost Cards to deal as much damage as possible from either increasing a specific Card's damage, or gaining the Morale buff for the entire team.
Alternative Team Members
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|---|---|---|---|---|---|---|---|---|---|---|---|
| Summary |
Best Team |
Best Cards |
Best Partner |
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| Memory Fragment |
Equipment |
Playstyle |
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| Character | Explanation |
|---|---|
 Kayron
|
Can replace Renoa as the Sub-DPS. Kayron benefits greatly from Rei's attack buffs through the use of his Futility and Black Hole cards. |
 Renoa
|
Can replace Rin as the DPS. Renoa works well with attack buffers as she can easily trigger multiple attacks with Dirge Bullets |
 Tressa
|
Can replace Renoa as the Sub-DPS. You can utilize her Shadow Daggers to consistently apply Agony at a low cost while also giving Rei space to deal damage as well. |
 Cassius
|
Can replace Mika as the Support. Cassius helps with Target drawing useful cards whenever possible to help setup the team more efficiently. |
Rei Best Cards
| Click on a Link to Jump to a Section! | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Summary |
Best Team |
Best Cards |
Best Partner |
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| Memory Fragment |
Equipment |
Playstyle |
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| Card | Explanation |
|---|---|
 Strike of Darkness
|
AP Cost: 1
Type:
 Attack
Tags: Lead ・150% Damage ・For 1 turn(s), +150% Basic attack card damage |
 Resonating Darkness
|
AP Cost: 1
Type:
 Upgrade
Tags: Unique ・+40% Damage for Void Card |
 Snack Time
|
AP Cost: 0
Type:
 Skill
Tags: Exhaust ・Select 2 card(s) in hand to Exhaust ・Select 1 Void card(s) to Draw |
 Dark Condensation
|
AP Cost: 1
Type:
Skill
・For 1 turn, +50% Damage to Void attack cards |
 Predator's Blade
|
AP Cost: 1
Type:
Attack
・250% Damage ・ For 1 turn 2 Morale |
The most important cards for Rei are her attack buff cards such as Strike of Darkness, Resonating Darkness, and Dark Condensation. These cards allow her to boost further the damage of our main DPS attack cards to comfortably deal huge damage, especially for Void characters.
On the other hand, Snack Time lets Rei target draw specific Void cards of your choosing so you can setup our main-DPS as early and consistently as possible.
Lastly, make sure you have Predator's Blade in your deck so that you can make use of the Morale buff further increase the damage output of the team. Since you will surely get the Sleeping Memory Manifest Ego for free, this allows you to have 4 Morale to reach a total of 80% increased damage in a single use.
Essential Team Cards and Epiphanies
| Rin Cards | Explanation |
|---|---|
 Dark Mist Secret Art: Annihilation
|
AP Cost: 1
Type:
Attack
Tags: Haste ・50% x2 Damage ・Dark Mist Blade Art: +2 hits |
 Dark Mist Secret Art: Black Dance
|
AP Cost: 1
Type:
Attack
・80% damage ・Dark Mist Blade Art: +1 Damage count according to the number of Skill cards in hand (Max 5 times) |
 Drawing Slash
|
AP Cost: 0
Type:
Attack
Tags: Haste ・150% Damage ・Obtain Dark Cloud Stance ・Dark Mist Blade Art: +1 Damage count |
| Mika Cards | Explanation |
 Source of Water
|
AP Cost: 0
Type:
Skill
・Heal 150% ・1 AP ・1 Wave |
 Tactical Analysis
|
AP Cost: 0
Type:
Skill
・2 Wave ・For 1 turn, +50% Healing |
As for Rei's teammate cards, we recommend focusing on getting Wave buffs for Mika so you can easily recover AP and continue buffing Attack cards with more damage. For Renoa, make sure to prioritize getting more Dirge Bullets so Rei can keep buffing them for that extra damage boost.
Rei Best Partner
| Click on a Link to Jump to a Section! | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Summary |
Best Team |
Best Cards |
Best Partner |
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| Memory Fragment |
Equipment |
Playstyle |
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| Partner | Details |
|---|---|
 Nyx
|
Passive Effect: Errante Hurricane - The assigned combatant's HP and healing are increased by 8%. When the assigned combatant Draws for the first time each turn using an ability, +8% Damage dealt by allies for 1 turn. Ego Skill: Resonance - Discard up to 3 cards, then Draw +1 cards equal to the number discarded |
The best partner for Rei is Nyx due to her ability to apply damage buffs for the team every time Rei uses Snack Time. Furthermore, her Ego Skill allows you to redraw 3 cards so you can setup your main DPS efficiently.
Alternative Budget Partner
| Partner | Explanation |
|---|---|
 Arwen
|
A defensive 4-star Partner replacement that provides Damage Reduction whenever an enemy plans to attack your team. |
 Yvonne
|
Balanced 3-star alternative that focuses on healing the team and gaining the Fortitude buff. |
Rei Best Memory Fragments
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|---|---|---|---|---|---|---|---|---|---|---|---|
| Summary |
Best Team |
Best Cards |
Best Partner |
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| Memory Fragment |
Equipment |
Playstyle |
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 Offering of the Void Set Offering of the Void Set When a card is Exhausted, increase Damage Amount of Void Cards by 20% for 1 turn |
 Seth's Scarab Set Seth's Scarab Set Increase the damage, Shield, and Healing of Basic Cards by 20% |
The best Memory Fragment sets for Rei are the Offering of the Void and Seth's Scarab for Void Damage and Basic card damage. This should allow Rei's Void team composition to maximize the damage output of her main DPS comfortably.
For your sub-stats, make sure to aim for getting Void Damage on your Desire slot, and Attack for the rest of your equipment slots to further increase the damage that Rei can provide for the team.
Stat Priority
| Main Stats | Recommended Substats |
|---|---|
|
Ideal: Attack%
Desire: Void Damage% Imagination: Attack% |
・ Attack%
・ Attack ・ Defense ・ Health% |
Rei's kit focuses on providing buffs but to use these, you'll still rely on using attack cards such as Predator's Blade and Strike of Darkness. Having more attack let's Rei scale as an extra source of damage.
Rei Best Equipment
| Click on a Link to Jump to a Section! | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Summary |
Best Team |
Best Cards |
Best Partner |
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| Memory Fragment |
Equipment |
Playstyle |
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| Weapon | Armor | Accessory |
|---|---|---|
 Violet Butterfly's Whip Violet Butterfly's Whip +20% Damage for Attack Cards costing 1 or less |
 Chains of Obsession Chains of Obsession When using Attack cards, 1% HP Reductiion, 60% Fixed Shield |
 Natural Predator Natural Predator On Ravage, +100% Damage to next 1 Attack Card used |
The best equipment for Rei consists of Violet Butterfly's Whip for more damage to 1-cost Cards, Chains of Obsession to gain Shields every time you use Attack cards, and Natural Predator to further buff your next Attack card whenever you trigger Ravage.
Do note that these equipment can be obtained from the Twin Star's Shadow Chaos Manifestation, which you can unlock as you progress through Chapter 2 Story Missions.
Rei Build Tips and Playstyle
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|---|---|---|---|---|---|---|---|---|---|---|---|
| Summary |
Best Team |
Best Cards |
Best Partner |
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| Memory Fragment |
Equipment |
Playstyle |
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Apply Damage Buffs to High-Value Cards
The main focus on Rei's role is to apply short Damage buffs to your main DPS Attack cards and deal the highest amount of damage possible in a single turn. This is especially useful for Void characters such as Renoa and Kayron as Rei has a ton of epiphanies that specialize on buffing Void cards.
Although it is viable for Rei to use her own Attack cards, we only recommend doing that if you get a bad Draw where you only have Rei Attack cards in your hand. Make sure to always prioritize the main-DPS Attack cards to fulfill Rei's role as an Attack Buffer.
Use Snack Time for Target Drawing
Snack Time is an essential card in Rei's kit as it allows you to Exhaust cards in your hand so you can avoid drawing a specific card in your coming turns. With the Epiphany that allows you to select a Void card to draw, this enables Rei to target draw specific Void cards for your main-DPS to setup their Attack cards at the right moment and maximize their damage output.
Chaos Zero Nightmare (CZN) Related Guides
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|
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|
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|
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|
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|
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|
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|
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|
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|
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|
 Veronica
|
 Yuki
|
4 Star Character Builds
 Amir
|
 Beryl
|
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|
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|
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|
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|
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|
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|
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|
 Selena
|
Tressa
|
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Rei Best Team and Build
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