Cassius is a character from Chaos Zero Nightmare. See best builds, partner, cards, stats, ego skill, potential, manifest ego, class, tier rank in CZN.
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All Characters (Combatants) ListCassius Balance Adjustments
Season 2 Balance Adjustments
Cassius’s quest rewards are being balanced to reduce overpowered builds and allow more playstyles while keeping him effective in team compositions.
See Cassius Balance Adjustment Details| Adjustment Target | Before | After |
| Quest Mechanic Changes | When conditions are met during battle, generate a Quest card as a reward. Quest card is excluded from the criteria. | When conditions are met during battle, generate a Quest card as a reward, 80% Fixed Healing (3 times per turn),Quest card is excluded from the criteria. |
| Triple0 | Cost 0 / Attack / [Exhaust/Ephemeral] 40% Damage for each Attack Card used this turn | Cost 0 / Attack / [Exhaust/Ephemeral] 40% Damage, +40% Damage Amount for each Attack Card used this turn (max 4 times) |
| Empowered Triple 0 | Cost 0 / Attack / [Exhaust/Ephemeral] 50% Damage for each Attack Card used this turn | Cost 0 / Attack / [Exhaust/Ephemeral] 50% Damage, +50% Damage Amount for each Attack Card used this turn (max 4 times) |
| Triple 1 | Cost 0 / Attack / [Exhaust/Ephemeral] 90% Damage, Heal 90% | Cost 0 / Attack / [Exhaust/Ephemeral] 150% Damage, Heal 150% |
| Empowered Triple 1 | Cost 0 / Attack / [Exhaust/Ephemeral] 120% Damage, Heal 120% | Cost 0 / Attack / [Exhaust/Ephemeral] 200% Damage, Heal 200% |
| Full House | Cost 0 / Skill / [Exhaust/Ephemeral] Draw 1 | Draw 1, Decrease Stress of a random ally by 2 |
| Strengthened Full House (Added on 1/26 09:07) | Cost 0 / Skill / [Exhaust/Retain] Draw 1 | Cost 0 / Skill / [Exhaust/Retain] Draw 1, Decrease Stress of a random ally by 3 |
| Dice Trick | Cost 2 / Attack / 240% Damage, Decrease Cost by the number of completed Quests | Cost 2 / Attack / 240% Damage, reduce 1 Morale for 1 turn, decrease Cost by the number of completed Quests |
| Dice Trick Unique Epiphany 1 | Cost 2 / Attack / 360% Damage, Decrease Cost by the number of completed Quests | Cost 2 / Attack / 360% Damage, reduce 1 Morale for 1 turn, decrease Cost by the number of completed Quests |
| Dice Trick Unique Epiphany 2 | Cost 2 / Attack / 300% Damage to all enemies, Decrease Cost by the number of completed Quests | Cost 2 / Attack / 300% Damage to all enemies, reduce 1 Morale for 1 turn, decrease Cost by the number of completed Quests |
| Dice Trick Unique Epiphany 3 | Cost 0 / Attack / 80% Damage, +80% Damage Amount for each completed Quest | Cost 0 / Attack / 80% Damage, +80% Damage Amount for each completed Quest (max 5 times) |
| Dice Trick Unique Epiphany 4 | Cost 2 / Upgrade / When using Quest Card, Heal 100%, 100% Fixed Damage to a random enemy | Cost 2 / Upgrade / [Unique] When using Quest Card, Heal 100%, 100% Fixed Damage to a random enemy |
| Dice Trick Unique Epiphany 5 | Cost 2 / Upgrade / When Quest is completed, create 1 Quest Card | Cost 2 / Upgrade / [Unique] At the start of the turn, create 1 empowered Quest card |
Cassius Basic Information & Rating

| Rare | Class | Attribute |
|---|---|---|
![]() | Controller | Instinct |
Cassius is an Instinct Controller. He is a character who possesses an abundance of Draw Cards and can increase hand cycling speed.
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 Cassius
Cassius Strengths & Weaknesses
Increases Hand Cycling
Cassius has many Cards that let him draw, allowing him to increase his hand cycling rate.
Build a Consistent Deck
By using his draw and card swapping abilities, you can build a stable deck that is less prone to a Bad Opening Hand. Since he often consumes AP, he has good synergy with Combatants that have AP recovery Cards.
Difficult to Use
Cassius is a Combatant that is somewhat difficult to use, as playing him requires an understanding of Card composition and how to play the deck. To maximize his performance, you will need to carefully adjust your save data and deck construction.
How To Use Cassius?
Fulfill Conditions to Complete Quests

Cassius is a character that revolves around quests created by Pop Eyed Popper. One of four types of quests is selected, and completing it creates Cards.
Full House is Excellent

Among the four types of quest cards, Full House is the most excellent. Using Full House allows you to draw one card, helping to replenish your hand.
Support the Team with Draw Effects

Cassius has like Shuffle and Devil Dice. By combining him with Haru or Renoa, he enables stable Attacker operation.
Best Team for Cassius
Haru Attacker Team Comp
A team comp where Haru is supported by Cassius and Mika. You can aim for a stable playstyle by cycling your hands with Cassius and managing AP with Mika.
Best Partner for Cassius
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. |
Nyx is recommended for Cassius because her effect buffs allies when you draw. Arwen, who reduces enemy damage, is also a recommended option.
Recommended Memory Fragments
Tetra's Authority Set is Recommended
| Memory Fragments | Effect |
|---|---|
Tetra's Authority Set | [2-Set] +12% Defense |
Executioner's Tool Set | [2-Set] +25% Critical Damage |
Black Wing Set | [2-Set] +12% Attack |
The recommended Memory Fragments for Cassius is the Tetra's Authority Set, because it enhances his Heal by increasing his Defense. Also, since he's a character that can also deal damage, increasing his damage with the Executioner's Tool Set or the Black Wing Set is also recommended.
Cassius Manifest Ego Guide & Priority
| Manifest Ego | Effect |
|---|---|
| M1 | [Recommended]: ★★★ Add Graveyard to the target range of the Joker card effect. |
| M2 | [Recommended]: ★★★ Heal Cassius by 40% each time he draws with an ability |
| M3 | [Recommended]: ★・・ Increase the level of Potential by +3 for [Upgrade Basic Cards], [Upgrade Neutral Cards], and [Upgrade Unique Cards]. |
| M4 | [Recommended]: ★★・ +2 Death Trick Moral reduction to all enemies |
| M5 | [Recommended]: ★・・ Increase the level of Potential by +3 for [Upgrade Basic Cards], [Upgrade Neutral Cards], and [Upgrade Unique Cards]. |
| M6 | [Recommended]: ★★・ Whenever Cassius completes a quest, inflict 1 Morale Down on all enemies for 1 turn. |
Aim for 2 Manifest Ego
At 2 Manifest Egos, Cassius unlocks the ability to activate Heal when drawing with a skill. This gives him added value as a healer, making it a highly recommended stopping point.
All Cards Of Cassius
Starting Cards
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Starting Cards Detail
| Name | Effect |
|---|---|
| Cards | 139% Damage Draw 1 with a 30% chance |
| Wild Card | 297% Damage Draw 1 with a 30% chance |
| Mana Field | Heal 132% |
| Pop Eyed Popper | Start a random 1 out of 4 Quests |
Pop Eyed Popper
| Cost | Epiphany |
|---|---|
| 0 | [Outbreak of War] Start a random 1 out of 4 Quests |
| 0 | Start 1 random Quest out of 4 Create Quest Card, remove Ethereal, grant Retain |
| 0 | Start 1 random Quest out of 4 Upon completing the Quest, create a stronger Quest Card |
| 0 | From 4 Quests, choose 1 to begin |
| 0 | Start 1 random Quest out of 4 Upon completing the Quest, replace it with another random Quest |
Epiphany Cards
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Epiphany Cards Detail
| Name | Effect |
|---|---|
| Devil Dice | 160% Damage Draw 1 |
| Shuffle | [Exhaust] Discard all cards in hand Draw as many as the number discarded |
| Dice Trick | 317% Damage Decrease cost by the number of completed Quests |
| Joker | Select 1 card from the Draw Pile or Discard Pile, move it to hand |
Devil Dice
| Cost | Epiphany |
|---|---|
| 1 | 264% Damage Create 1 Quest Card(s) |
| 1 | [Retrieve 3] 211% Damage Draw 1 |
| 1 | 211% Damage to all enemies Draw per target hit |
| 1 | 317% Damage Draw 2 Discard 2 |
| 0 | Draw 1 106% Damage to all enemies equal to that card's cost |
Shuffle
| Cost | Epiphany |
|---|---|
| 1 | [Exhaust 2] Discard all cards in hand Draw as many as the number discarded |
| 1 | [Exhaust] Discard any number of cards from hand. Draw the same number of cards |
| 1 | [Exhaust] Move all cards from hand and Discard to Draw Pile, then Draw 5 |
| 0 | [Exhaust] Select up to 5 cards from Disacard to place on top of Draw Pile |
| 0 | Draw 3 If the total cost of those cards is 4 or less, Discard them all |
Dice Trick
| Cost | Epiphany |
|---|---|
| 2 | 475% Damage Decrease Cost by the number of completed Quests |
| 2 | 396% Damage to all enemies Decrease cost by number of completed Quests |
| 0 | 106% Damage +80% Damage per completed Quest |
| 2 | When Quest Card is used, Heal 100%, 100 Fixed Damage to a random enemy |
| 2 | On Quest completion, create 1 Quest Card(s) |
Created Cards
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Created Cards Detail
| Name | Effect |
|---|---|
| Quest: Triple 0 | When using 3 cards with cost 0, create Triple 0 |
| Quest: Triple 1 | When using 3 cards with cost 1, create Triple 1 |
| Quest: Straight | When using cards costing 0, 1, and 2 each, create Straight Card |
| Quest: Full House | When each combatant uses a card, create Full House |
Ego Skill and Potential
Ego Skill
| Name | Effect |
|---|---|
| Death Trick | EP: 4 Generates 2 Quest Cards. For 1 turn, -3 Morale to all enemies |
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) | Add a 30% chance to draw 1 card to Card and Wild Card. |
| Upgrade Card (Unique Card Upgrade) | Increase Damage, Shield Gain, and Heal Amounts of Unique Cards by 2% |
| Stats (Health Proficiency) | Stamina increases by 1.6% |
| Stats (Critical Damage Proficiency) | Increases Attack by 1.6% |
| Basic Card (Basic Card Proficiency) | +5% Damage for Cassius's Card and Wild Card If Cassius Health is greater than 600, an additional +5% to that value |
| Unique Stats (Unique Stat Upgrade) | On Quest Completion, gain 1 Morale for 1 Turn If Cassius's Health is greater than 700, gain an additional 1 Fortitude for 1 turn on Quest Completion. |
Profile & Voice Actors
Character Profile
| Race | Cyborg |
|---|---|
| Birthday | July 7th |
| Gift | Blink |
| Affiliated Faction | Peltion Company 110 |
Magician seeking to deceive the world.
After experiencing death once, Cassius carries the motto, "The world is all an illusion." He roams the universe in search of a way for lifeforms to achieve immortality, treating the death and resurrection experienced in Chaos as a form of immortality.
Voice Actor / Actress (Japanese)
| VA | Kosuke Toriumi |
|---|
Chaos Zero Nightmare Related Guides

Tetra's Authority Set
Executioner's Tool Set
Black Wing Set