Chaos Zero Nightmare Fei Build Guide – Best Epiphanies, Decks and More

Luna
2026/07/09 09:11:02

The powerful Chinese woman who is capable of setting the heaven ablaze with her powerful flame cards, Fei makes her grand debut in Chaos Zero Nightmare. In this guide, we will go over the best builds for Fei in Chaos Zero Nightmare so that players can clear all of the game’s end game contents easily.

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Fei Skill Kit & Playstyle Analysis

General Introduction

Fei is a 5-star Character of the Void Element and Ranger Class. She specializes in generating various cards in the deck and using them to stack up her flame arts to deal powerful extra attack damage to enemies and stacking up her descend stacks to use a powerful attack against the enemies once she used enough Flame Arts.

Chaos Zero Nightmare Fei

Fei Playstyle Analysis

Fei’s main gameplay revolves mainly around her ability to draw large amounts of cards quickly in a turn in order to be able to draw her important cards and use them in a turn to generate Flame Arts stacks to deal extra attack damage to enemies. Upon drawing enough cards with her abilities, Fei will generate a powerful exhaust card that can be used to deal powerful damage to enemies.

Fei’s set up card is her Exorcist’s Formation card, which allows her to create 8 Inferno Rhapsody cards in the deck and allows her to gain Descend stacks whenever a card is drawn. Upon gaining 8 Descend stacks, Fei will additionally generate a Heavenfalls card, which can be used to deal powerful damage to enemies. This effect can be generated 10 times per turn.

Inferno Rhapsody cards are Fei’s main damaging cards and her most important cards, with their 0 Cost and the ability to grant Fei 1 Flame Arts whenever they are used. Upon using 3 Flame Arts, she will deal an additional extra attack instance of damage to enemies and activate additional effects of the Inferno Rhapsody card if it is the card that activates the Flame Arts damage effect.

In essence, Fei’s gameplay revolves around drawing as many cards as possible within the turn to get as many Inferno Rhapsody cards on the hand as possible, then use them all up in the turn to activate Flame Arts as much as possible while also dealing damage from the Inferno Rhapsody cards. While doing this, Fei will generate additional Heavenfall cards in the deck by gaining Descend stacks, allowing her to generate and use up to 10 additional Heavenfall attacks on enemies every turn if she draws enough cards in a turn.

Fei Best Cards And Epiphany Priority

Here are an analysis of all of Fei’s cards and their most important Epiphanies:

100% Damage
Azure FlameFei’s basic attack card. Should be removed whenever possible.
Importance: Low
100% Shield
MelancholyFei’s basic defense card. Should be removed as soon as possible. 
Importance: Low
[Initiation] [Unique]

When Drawing through an ability, 1 Descent.
Create 8 Inferno Rhapsody cards in the Draw Pile.
Exorcist’s FormationFei’s main enabling card, allowing her to generate Inferno Rhapsody Cards and gains Descent stacks whenever a card is drawn.
Importance: Highest
Epiphanies
#1[Initiation] [Unique]

On Draw through an ability, 1 Descent.
Create 8 Inferno Rhapsody in Draw Pile
+50% Damage Amount to those cards.
Medium Value Epiphany
#2[Initiation] [Unique]

On Draw through an ability, 1 Descent.
Create 8 Inferno Rhapsody in Draw Pile.
At the start of the turn, Draw 1 Inferno Rhapsody.
High Value Epiphany
#3Change Cost to 0

[Initiation] [Unique]

On Draw through an ability, 1 Descent.
Create 8 Inferno Rhapsody in Draw Pile.
Draw 2.
Medium Value Epiphany
#4[Initiation] [Unique]

On Draw through an ability, 1 Descent.
Create 7 Inferno Rhapsody in Draw Pile.
When Flame Arts is activated, 100% Extra Attack on the target.
Best Epiphany
#5[Initiation] [Unique]

On Draw through an ability, 1 Descent.
Create 6 Inferno Rhapsody: Heaven in Draw Pile.
High Value Epiphany
Draw 2.
Of those Drawn cards, Discard all 1-Cost or higher cards.
SoliloquyOne of Fei’s draw engine cards that allows her to draw cards and enable her playstyle, should be duplicated if possible.
Importance: High
Epiphanies
#1Draw 3.
Of those Drawn cards, Discard all 1-Cost or higher cards.
High Value Epiphany
#2Draw 2 0-Cost card(s) of this unit.Best Epiphany
#3Change Cost to 1.
Activate 3 Inferno Rhapsody in Draw Pile on the target.
2 Descent for each activated card.
High Value Epiphany
#4Draw 1.
When a 2-Cost or lower card of this unit is Drawn, activate that card and Draw 2.
High Value Epiphany
#5Draw 1 cards with a Cost of X.
Apply the X of that card as X+1 until used.
Medium Value Epiphany
1 Flame Arts.
Streak: Draw 1 Inferno Rhapsody.
Night RainAnother of Fei’s enabling cards that allows her to gain additional Flame Arts outside of spamming cards.
Importance: High
Epiphanies
#11 Flame Arts.
Streak: Draw 2 Inferno Rhapsody
Medium Value Epiphany
#22 Flame Arts.
Streak: The next 2 times Flame Arts is activated, 2 Flame Arts.
High Value Epiphany
#3Change Cost to 1.

1 Flame Arts for each Inferno Rhapsody in Graveyard.
High Value Epiphany
#42 Flame Arts.
At the start of the turn, move to hand.
Best Epiphany
#51 Flame Arts.
Streak: Apply the next X as X+2.
Medium Value Epiphany
100% Damage x X+1.
Draw X.
Soulfire DanceOne of Fei’s main damaging cards, allowing her to both deal damage to enemies while also draw cards at the cost of all of the team’s AP.
Importance: High
Epiphanies
#1150% Damage × X+1,
Draw X.
Medium Value Epiphany
#2[Unique]

100% Damage × X+1.

Activate Inferno Rhapsody in Graveyard on the target for each Hit Count.
High Value Epiphany
#3150% Damage × X+1.

Increase Damage Amount of the next Heavensfall by 50% for each Hit Count (max 500%).
Medium Value Epiphany
#4Change Card To Skill

Draw X, X Flame Arts × 2, X Descent.
High Value Epiphany
#5Change Cost to 2. Change Card to Upgrade

[Unique]

Add 1 Hit(s) to Flame Arts.
Best Epiphany
[Exhaust] [Unique]

Move Inferno Rhapsody cards to Hand for each Descent gained this turn.
Blazing War DanceA powerful emergency damage enabling card that allows Fei to move all of her Inferno Rhapsody cards into the hand once in the entire battle, allowing her to deal devastating damage to the enemies within 1 turn.
Importance: High

Fei Best In Slot And F2P Partners

Fei Best Partners

Fei’s best partner is her signature 5-star partner: 

Ruixiang
Passive Effect: Increase the assigned Combatant’s Attack by 16–24%.

Each time the assigned Combatant creates a Void Attribute Attack Card in the Draw Pile, gain 1 Gentle Aroma.

When [Gentle Aroma] stacks to 5, +20-40% Critical Damage to assigned Combatant.

[Gentle Aroma]: +5-10% Damage Amount to the assigned Combatant (max 5 stacks)
Active Skill:
Draw 1 Attack Card of assigned Combatant.

If Cost of that card is either 0 or X, Draw 2.
Reason: Fei’s signature Partner that grants her amazing critical stats and damage increase when she generates Void Attribute Attack Cards.

For F2P options, players should use these as Fei’s Partners:

Rosaria
Passive Effect: 
Increase the assigned Combatant’s Attack by 8/16%.

The assigned combatant’s Extra Attack damage is increased by 10/20%.

When the assigned combatant uses an Upgrade or Skill card, 25/50% chance to gain 1 Morale for 1 turn.
Active Skill: 
Draw 1 Enhanced Card(s).
If there are no Enhance Cards in the Draw Pile, Draw 1 Card.
Reason: The Budget Partner option for Fei that boosts her Extra Attack damage output.
Nakia
Passive Effect: The assigned combatant’s Attack is increased by 8/16%.

When an ally defeats an enemy, gain 1 [Backline Support].

[Backline Support]: +10/20% Damage of 1 attack card. Upon activation, Backline Support is reduced by 1 (up to 3 stacks).
Active Skill: 
Deal 200% Damage.
Reason: The 3-Star Partner budget option for Fei that should be replaced as soon as players get better Partners for her.

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Fei Best Equipment & Refinement

For Equipment build when running Chaos, players should aim for these equipments for Fei to maximize her power:

Criticism of Discord
+18% Attack
On Ravage, decrease Stress of allies by 1
Reason: This equipment helps boost Fei’s damage output by boosting her attack stat.
Fairy King’s Crown
+6% Critical Chance
Reason: An amazing Equipment that boost Fei’s critical chance.
Verdant Night
On even turns, +12% Attack, +8% Defense
Reason: This equipment helps to boost Fei’s overall damage output by boosting her attack and defense stats on even turns.

Fei Best Memory Fragments Sets & Stats

Fei Best Memory Fragments Set

For Fei, players should use a mix of 3 different memory fragment sets: the 2pcs Black Wing set to boost her attack, the 2pcs Executioner’s Tool set to boost her Critical Damage and the 2pcs Curse Corpse set to boost her damage output against enemies under the Agony effect.

Black Wing
2-pc: +12% Attack
Explanation: This set helps boost Fei’s Attack to optimize her damage output.
Executioner’s Tool
2-pc: +25% Critical Damage
Explanation: Boost Fei’s Critical Damage stat to optimize her damage output.
Curse Corpse
2-pc: Increases damage dealt to targets inflicted with Agony by 10%.
Explanation:  Boost Fei’s damage when enemies are under the Agony debuff.

Fei Best Main Stats & Sub Stats

As a main/sub DPS character, Fei wants your usual offensive stats for her Main and Sub stats.

PieceMain Stats
IdealCritical Chance%
DesireVoid Damage%
ImaginationAttack%
PrioritySub Stats
1stCritical Chance%
2ndCritical Damage%
3rdAttack%
4thAttack

Important Stat Threshold:

– Players need to get Fei to at least 700 Attack to maximize her last Potential to grant her additional Void Damage buff.

– Players should invest in boosting Fei’s Critical Chance and Critical Damage as high as possible to optimize her damage output.

Fei Best Teams 

As a character that can fill in the Main and Sub DPS slot for different teams, Fei works best alongside teammates that can allow her to draw as many cards as possible while supplementing her overall damage output with buffs 

FeiVeronicaRei
Main DPSSub DPS/ SupportSupport/ Sustain

This team makes use of Fei’s playstyle of drawing and using multiple cards in succession in the same turn in order to make her to team’s main hypercarry DPS while being supported by other characters. 

Veronica serves mainly as a draw engine for Fei, capable of drawing up to 10 cards or more in the same turn thanks to her amazing draw cards, additionally, she can also serve as a sub DPS with her Balista cards. Hugo or other characters that have good drawing effects can also fill this role. 

Rei serves as the team’s main sustain and damage support as she has the ability to boost the damage output of Void cards and 0 Cost Cards, allowing Fei to deal more damage with her Void 0-Cost Cards while being sustained by Rei’s healing abilities.

Conclusion

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Writer
Luna
Content Writer & Salty Gacha Enthusiast
A gacha games enthusiast that dabbles way too much in the gacha gaming field and plays too many gacha games all at once. Excel at challenging, clearing contents and having fun in multiple gacha games at the same time like Honkai: Star Rail, Zenless Zone Zero, Wuthering Waves, Fate/Grand Order, Reverse: 1999 and more. Currently playing over 10 gacha games at once and is considering playing more at the cost of his own sanity. Aims to provide as many informational game guides and articles as possible to help players have a better understanding of the characters and games they play to the best of his abilities.
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