Chaos Zero Nightmare Diana Best Build & Teams

Alright, let's address the real issue first: if your Diana run feels like flipping a coin between "god-tier combo" and "why is my hand full of garbage," it's not bad luck—you just built her wrong.

This guide cuts the nonsense and tells you exactly how to stabilize Diana in Chaos Zero Nightmare—the skill & card anlysis, best Memory Fragments, Equipment, Partners, and team comps that make her Discard loop actually function instead of emotionally damaging you.

Diana Overview

Diana is an 5-Star Passion Hunter. She creates Heart Bullets and uses Discard to amplify her Damage Amount.

Diana's card is centered around a Discard-driven combat loop that enables frequent Extra Attacks and strong damage scaling over time. Through cards like Quietus, she can generate resources and apply debuffs without consuming Cost, making her highly efficient in extended encounters. However, her damage output is not front-loaded—since Flutter stacks reset each turn, she must continuously rebuild momentum, which limits burst consistency. Additionally, her performance is heavily dependent on proper setup, including maintaining Resonance on targets and sustaining a stable Discard/Draw cycle; any disruption to this flow can significantly reduce her effectiveness.
To play Diana effectively, you need to establish her engine early by triggering Quietus to generate Heart Bullets and apply Resonance while conserving resources. From there, the focus is on maintaining a steady Discard cycle, using cards that naturally rotate your hand to keep pressure consistent. Each Discard triggers Extra Attacks on Resonance-affected enemies, so keeping this debuff active is critical for maximizing damage. Throughout the turn, you also build Flutter stacks, which enhance her end-of-turn attack—making proper sequencing and continuous action key to optimizing her total damage output.

 

Skill & Card Anlysis

Starting Cards

Disruption Fire (1 Cost, Attack)

100% Damage.

Protect Me (1 Cost, Skill)

Heal 100%.

[Heal]: Recover Health based onDefense (30% of Combatant's DEF Stat).Recover a random combatant's Stress by1-6 depending on the Healing amount.

With All My Heart! (1 Cost, Attack)

[Quietus] 100% Damage. Create 2 Heart Breaker.

[Quietus]: When the card is Discarded,activate it; cannot be moved from theUsed Card Pile that turn.

Epiphany Cards

C'mere, Milk & Pong! (1 Cost, Skill)

Create 2 Heart Shaker.

Pistol of Purification (1 Cost, Attack)

[Bullet][Quietus] 120% Damage. 2 Resonance. If this card is Discarded, activate Resonance inflicted on the target by this unit 3 more times.

[Bullet]: Cards with the Bullet keyword[Quietus]: When the card is Discarded,activate it; cannot be moved from theUsed Card Pile that turn.[Resonance]: On card Discard, deal 80%Extra Attack, then decreaseResonanceby 1.

Blooming Love (1 Cost, Skill)

Draw 1 Quietus card(s). Discard 2.

[Quietus]: When the card is Discarded activate it; cannot be moved from the Used Card Pile that turn.

Liberated Feelings (2 Cost, Attack)

Draw 2 Exhaust Bullet card(s), 300% Damage, Increase Damage Amount by 30% for each different Bullet card in hand.

[Exhaust]: When used, this card movesto the Exhaust pile.

[Bullet]: Cards with the Bullet keyword

Generated Cards

Heart Shaker (0 Cost, Skill)

[Bullet][Haste][Exhaust] 1 Resonance. Discard 1 random card(s) from Draw Pile.

If this card is Discarded, 2 Resonance to a random enemy.

[Bullet]: Cards with the Bullet keyword.

[Haste]: This card does not reduce theenemy's action count

[Exhaust]: When used, this card movesto the Exhaust pile.

[Resonance]: On card Discard, deal 80%Extra Attack, then decreaseResonanceby 1.

Heart Breaker (0 Cost, Skill)

[Bullet][Haste][Exhaust] 80% Damage. Discard 1 random Bullet card(s).

[Bullet]: Cards with the Bullet keyword.

[Haste]: This card does not reduce theenemy's action count

[Exhaust]: When used, this card movesto the Exhaust pile..

Cupid Shot (0 Cost, Attack)

[Bullet][Quietus] 120% Damage. 60% Extra Attack to a random enemy for each Bullet card in hand..

[Bullet]: Cards with the Bullet keyword.

[Quietus]: When the card is Discarded,activate it; cannot be moved from theUsed Card pile that turn.

Ego Skill

Radiant Smile (5 Cost, Ego Skill)

?

Create 1 Cupid Shot, Create 2 Heart Bullet.

[Heart Bullet]: Heart Breaker, HeartShaker.

 

Card Removal & Dupe Priority

Card Removal

Top Priority: Barrier Deployment
Pure sustain at 1 AP is inefficient in Diana's engine-centric build. Once your Archetype loop is active, survivability is better handled through hybrid-value cards rather than dedicating slots to healing alone. Cutting this improves deck density and increases the probability of drawing core engine pieces.

Second: Matter Disintegration
While acceptable in early progression, its value declines sharply in optimized builds. It provides damage but does not contribute to Archetype generation, card draw, or engine scaling. Removing it reduces low-synergy draws and improves overall cycle efficiency.

Third: Low-impact filler cards (non-synergistic draws)
Any remaining cards that neither generate Archetypes nor accelerate access to Quantum Seed should be trimmed. These dilute the deck and slow down consistency, particularly in longer cycles where engine uptime determines performance.

Dupe Priority

Top Priority: Quantum Seed
This is the core engine enabler. More copies significantly increase consistency by ensuring earlier and more frequent activation. It reduces dead turns and stabilizes your entire Archetype generation loop.

Second: Creation and Destruction
A highly efficient 1 AP multi-function card (damage, shield, heal). With Harmonization, its value scales disproportionately, often enabling strong tempo swings. Additional copies increase access to these high-impact turns.

Third: Form Convergence
[Retain] provides precise timing control, allowing you to hold it for optimal combo turns. Drawing two Archetypes directly supports the engine loop, preventing stalls and maintaining momentum. More copies improve both flexibility and consistency.

 

Stat Priority

Main Stats
Ideal	Critical Chance %
Desire	Passion Damage %
Imagination	Attack %

Recommended Substats

Critical Chance %> Critical Damage %> Extra Damage %> Attack

Prioritize fully offensive main and sub stats for Diana, focusing on Passion Damage, Critical Chance %, and Critical Damage %. In particular, aim to maximize her Critical Chance, as her final potential node increases the extra damage she deals for every 10% Critical Chance she has, making it a key scaling stat for her overall output.

 

Diana Best Gear

Best Memory Fragments

Cursed Corpse Set (2-PC)	Black Wing Set (2-PC)	Executioner's Tool Set (2-PC)
Increases damage dealt to targets inflicted with Agony by 10%.	+12% Attack	+25% Critical Damage

The best memory fragment setup for this build is a combination of Black Wing, Cursed Corpse, and Executioner's Tool, using a 2/2/2 configuration. Since none of the 4-piece sets benefit her, focusing on these three 2-piece sets to boost her damage output is the optimal choice.

Best Equipment

Weapon	Armor	Trinket
Intellect of Discord	Fairy King's Crown	Dimensional Cube
+18% Attack On Ravage, decrease Stress of allies by 1	+6% Critical Chance.	When a card is Discarded, +15% Damage Amount for 1 turn (max 3 stacks).
Provides a flat ATK boost that directly amplifies all of Diana's damage, especially her frequent Extra Attacks triggered through Discard mechanics.	Grants valuable Critical Chance that synergizes with Diana's scaling, while the Stress reduction adds minor team sustain and consistency.	Perfectly aligns with Diana's core playstyle, stacking damage each time a card is Discarded and significantly increasing her output during

 

Diana Best Partner

Sophia

• Increases Attack
• Boosts Critical Damage through Discard
• Triggers Extra Attacks via Bullet Discard
• Enhances Extra Attack Damage with Ego Skill

Sophia is Diana's best partner, as her kit directly enhances Diana's Discard-based playstyle and Extra Attack damage. She provides solid Attack and Critical Damage buffs through Discard effects, while also triggering additional Extra Attacks after specific Discard conditions are met. Her Ego Skill further strengthens this synergy by enabling extra draw and discard cycles and granting up to +40% additive damage to Extra Attacks for multiple turns, significantly boosting Diana's burst potential.

 

Best Team Compositions

Premium Team

Diana

Renoa

Nia

This team is built around consistently chaining Dirge Bullet effects through a Discard-focused engine. Renoa provides steady generation of Dirge Bullets and contributes additional damage triggers when they are discarded, reinforcing the core damage loop. Nia supports the setup by improving card draw consistency and providing healing sustain, while also enabling more frequent Extra Attack opportunities. Together, they maintain high card flow, stable Discard cycles, and sustained Extra Attack uptime for Diana's core gameplay.

Sustained Attack Team

Diana

Hugo

Tiphera

This team improves the consistency of Commence the Hunt cycles by enhancing card draw efficiency, while also providing AP support to maintain smoother turn-to-turn resource management.

Bullet Damage Team

Diana

Lucas

Mika

This team improves the consistency of Commence the Hunt cycles by enhancing card draw efficiency, while also providing AP support to maintain smoother turn-to-turn resource management.

 

Conclusion

So yeah—Diana isn’t weak, she’s just extremely unforgiving. Build her correctly and she turns into a machine gun of Extra Attacks. Build her wrong and you’ll spend half the run asking why your deck feels like it’s actively trolling you. The difference is literally just consistency.

And if you’re planning to push harder content or optimize your runs without suffering through resource drought, you can check out Chaos Zero top up on LDShop to speed things up a bit. Because let’s be honest—grinding is fun until it isn’t.