Chaos Zero Nightmare | Rei Guide - Best Build and Team

Rei is a character from Chaos Zero Nightmare. See best builds, partner, cards, stats, ego skill, potential, manifest ego, class, tier rank in CZN.

Table of Contents

Rei Balance Adjustments
Rei Basic Info
Rei Pros & Cons
How To Use Rei?
Rei Best Team
Rei Best Partner
Best Memory Fragments
Manifest Ego Guide & Priority
All Cards Of Rei
Ego Skill and Potential
Profile & Voice Actors

Reroll Tier List

Best Character Tier List

All Characters (Combatants) List

Rei Balance Adjustments

Season 2 Balance Adjustments

Rei’s healing will be strengthened by increasing Snack Time’s recovery and changing her basic card to a damage-based healing effect, reducing reliance on Ego Manifestation Stage 2 and improving party sustain.

See Rei Balance Adjustments Details

Adjustment Target	Adjustment Direction
Basic Card Potential Effect	The Critical Chance increase effect will be changed to a damage-based healing effect.
Snack Time	Healing capability will be increased.

Rei Basic Information & Rating

Rare	Class	Attribute
	Controller	Void

Rei is a Void Controller. She has an abundance of buff Cards and can fight while increasing her own damage.

Stats

Attack	Defense	Health
129	56	74
Crit Chance	Crit Damage
3.0%	125.0%

Rating

Best Character	Reroll
(SS>S>A>B)	(SS>S>A>B)

Rate Rei

Rei Strengths & Weaknesses

Abundant Buff Cards

Rei has four Cards that can increase damage. She has many buff Cards that affect allies, making it possible to increase the damage of the entire party.

Has a 0-cost Draw

"Snack Time" is a draw Card that can be activated for 0-cost. As Rei is a buffer who upgrades the party, having a draw Card makes her more consistent.

Low Durability

Rei is a Controller with Heal Cards, but she has a limited number of them. It is difficult to use her in a durability role, so be sure to support her with another character.

How To Use Rei?

Upgrade Ally Cards

Rei can Upgrade ally Cards by using Resonating Darkness or Dark Condensation. When forming a party, be sure to prioritize Combatants that are compatible with the Upgrade conditions and pair her with them.

Evade Bad Hand with Snack Time

Snack Time is a useful Card that exhausts 1 Card from your hands and lets you draw. When creating Save Data, will make your in-battle strategy more stable.

Serve as a Healer at 2 Manifest Ego

At 2 Manifest Ego, Rei can Heal when using an Attack Card once per turn. By being mindful of her strategy, she is a character who can also be used like a healer.

Best Team for Rei

Kayron Attacker Formation

Rei

Mika

Kayron

This formation supports Kayron with Rei and Mika. Rei's 1-cost Card damage buff and Mika's AP recovery synergize well, allowing Kayron to use Futility Exhaust more frequently.

Low-Cost Team Build

Rei

Beryl

Mika

This is a comp where Rei and Mika support Beryl. Beryl often uses her 1-cost Attack, allowing her to make use of Rei's buff.

Best Partner for Rei

Nyx is Recommended

Partner	Detail
Nyx	[★5] Obtained from Arkhianon Supply [Recommendation] ★★★ - Increases HP and Heal amount. - The first time you draw using a skill, increases ally damage. - Draw Cards equal to the number of Cards discarded with an Ego Skill.
Arwen	[★4] Obtained from Gacha [Recommendation] ★★・ - Increases HP and Heal amount. - Reduces damage depending on enemies in the attack warning state. - Heals and reduces damage with an Ego Skill.
Alyssa	[★4] Obtained from Gacha [Recommendation] ★・・ - Increases defense. - Recovers HP at the end of Combat. - Heal with Ego Skill (Heal amount increases in Injured state) + gain Morale.

Rei is a buffer, so Nyx is recommended as she can increase your allies' damage dealt. Alternatively, you can also use 4-star Partners.

Recommended Memory Fragments

Tetra's Authority Set and Seth's Scarab Set are Recommended

Tetra's Authority Set	[2-Set] +12% Defense
Seth's Scarab Set	[2-Set] Increases the damage, Shield, and Healing of Basic Cards by 20%
Executioner's Tool Set	[2-Set] +25% Critical Damage

The recommended Memory Fragments for Rei are the Tetra's Authority Set, which can enhance her healing by increasing her Defense. Additionally, the Executioner's Tool Set to increase her damage, and the Seth's Scarab Set to enhance both her offense and defense, are also highly compatible Memory Fragments.

Rei Manifest Ego Guide & Priority

Manifest Ego	Effect
M1	[Recommended]: ★・・ The Predator's Blade card increases Morale by 2 for 1 turn
M2	[Recommended]: ★★★ When Rei uses an Attack Card, heal for 120%. This effect triggers only once per turn.
M3	[Recommended]: ★・・ Increase the level of Potential by +3 for [Upgrade Basic Cards], [Upgrade Neutral Cards], and [Upgrade Unique Cards].
M4	[Recommended]: ★★・ +100% Damage for Final Shadow
M5	[Recommended]: ★・・ Increase the level of Potential by +3 for [Upgrade Basic Cards], [Upgrade Neutral Cards], and [Upgrade Unique Cards].
M6	[Recommended]: ★★★ Allie's attack card damage is increased by +20%.

Aim for 2 Awakenings First

At 2 Awakenings, Rei gains the ability to Heal with her own Attack Cards once per turn. This is a significant boost to her support capabilities, making 2 Awakenings a high-priority goal.

All Cards Of Rei

Starting Cards

Dark Blade

Material Regeneration

Strike of Darkness

Starting Cards Detail

Name	Effect
Dark Blade	15 Damage +139% Critical Chance
Material Regeneration	Heal 132%
Strike of Darkness	[Lead] 132% Damage For 1 turn, +100% Basic attack card Damage

Strike of Darkness

Cost	Epiphany
1	[Lead] 198% Damage For 1 turn, +150% Basic attack card Damage
1	462% Damage For 1 turn, -20% Damage
1	[Lead] 198% Damage Exhaust all Basic Cards, +1 extra hit for each
1	[Unique] +80% Basic attack card Damage
0	[Retain] Activate all Basic cards in Hand

Epiphany Cards

Resonating Darkness

Snack Time

Dark Condensation

Predator's Blade

Epiphany Cards Detail

Name	Effect
Resonating Darkness	[Unique] +40% Damage of cards with cost 1
Snack Time	[Exhaust] Select 1 card(s) from hand to Exhaust Heal 132% Draw 1
Dark Condensation	Choose 1 Attack Card(s) in hand, +100% Damage for 1 turn
Predator's Blade	330% Damage For 1 turn 4 Morale

Resonating Darkness

Cost	Epiphany
1	[Unique] +60% Damage of cards with cost 1
1	[Unique] +40% Damage for Void Card
1	[Unique] +40% Shield Gain, Damage, and Healing of cards with cost 1
1	[Unique] +40% Damage for cards with cost of 1 or below
0	For 1 turn, +80% Damage to cards with cost 1

Snack Time

Cost	Epiphany
0	[Exhaust 2] Select 1 card(s) from hand to Exhaust Heal 198% Draw 1
0	[Retain/Exhaust] Heal 198% Draw 2
0	[Exhaust] Select up to 2 card(s) from hand to Exhaust, then Draw that many
0	[Exhaust] From Draw Pile, select up to 1 card(s) to Exhaust, then Draw the same number of cards
0	[Exhaust] Select 2 card(s) in hand to Exhaust Select 1 Void card(s) to Draw

Dark Condensation

Cost	Epiphany
1	Choose 1 Attack Card(s) in hand, +150% Damage for 1 turn
1	Choose 1 card(s) in hand, +100% its Damage, Shield gain, and Healing for 1 turn
1	For 1 turn, +50% Damage to Void attack cards
1	Select 1 attack card(s), +100% Damage until used
1	Choose 1 Attack Card(s) from hand, +50% Damage

Ego Skill and Potential

Ego Skill

Name	Effect
Final Shadow	EP: 4 300% Damage +1 AP

Potential

Race	Effect
Epiphany Bonus (Combatant Epiphany)	When entering Chaos, obtain 1 random Rare Card with an activated Epiphany.
Upgrade Card (Basic Card Upgrade)	Increase Damage, Shield Gain, and Heal Amounts of Basic Cards by 2%
Upgrade Card (Common Card Upgrade)	Increase Damage, Shield Gain, and Heal Amounts of Common Cards by 2%
Basic Card (Basic Card Proficiency)	Dark Blade cards have 15% increased Critical Chance.
Upgrade Card (Unique Card Upgrade)	Increase Damage, Shield Gain, and Heal Amounts of Unique Cards by 2%
Stats (Health Proficiency)	Increase Health by 1.6%
Stats (Attack Proficiency)	Increase Attack by 1.6%
Basic Card (Basic Card Proficiency)	+5% Damage of Rei's Dark Blade If Rei's Attack is greater than 500, an additional +5% to that value
Unique Stats (Unique Stat Upgrade)	If Rei's Attack is greater than 550, +10% Predator's Blade Damage For every 10 Attack exceeding that value, an additional +1% (up to an additional +20%)

Profile & Voice Actors

Character Profile

Race	Human
Birthday	April 5th
Gift	Dark Material
Affiliated Faction	Terrascion SS Edenity

A cheerful young agent.

She is an enthusiastic and kind character with the ambition to protect everyone by her own strength. She is a Terrascion agent and also a student aboard the SS Edenity. She often makes quirky remarks or behaves in eccentric ways. She is a fan of a eccentric character brand called 'Coco'.