phainon

Phaseinon

DestructionPhysical5★Released: 01/07/2025 · v3.4
Last updated: 27/01/2026
Prisoner of Flames

“I’m Phaseinon of Aedes Elysiae. Greetings. As fellow outlanders in Okhema, our meeting is surely fate’s design. Come. Maybe we’ll even have a chance to fight alongside each other in the future.”

Other Names
Khaslana NeiKos496 Khaos
Trạng thái
Exists within As I've Written
Path story
Destruction
World
Amphoreus
Role
"Eternal Holy City" Okhema
Signature Light Cone
Thus Burns the Dawn
Debut Banner
To Evermore Burn as the Sun
Release Date
2025-07-02
Version
introduced in 2.6, playable from 3.4

Faction

  • Amphoreus
  • Chrysos Heirs
  • Aedes Elysiae
  • Okhema
  • Grove of Epiphany
  • Nousporists

Relatives

  • Hieronymus (father)
  • Audata (mother)
EN Joshua Waters Justine Huxley (Childhood)
CN Qin Qiege (秦且歌) Mi Yang (弭洋) (Childhood)
JP Hino Satoshi (日野 聡) Aihara Kotomi (藍原 ことみ) (Childhood)
KR Yoon Yong-sik (윤용식) Park Ha-jin (박하진) (Childhood)
  • The Nameless Hero
  • Deliverer
  • Blazing Sun
  • Flame Reaver
  • Throne of Worlds
  • Vessel of the Destruction
  • Worldbearer
  • Bearer of Chaos

Playstyle overview

Phaseinon is a damage dealer who can transform into {{Obfuscate

Stats Base

Lv. 80
  • HP Base
  • ATK Base
  • DEF Base
  • SPD
  • Taunt

Ascension Materials

20304050607080
Pros & Cons

Pros

  • Simple yet extremely strong
  • Playable without a sustain unit, and he even prefers it that way
  • Has plenty of good free teammate options
  • Makes good use of even short-duration buffs
  • His Ultimate turns him into a genuine boss with enormous durability, crowd control immunity, and death resistance
  • Huge damage multipliers that soak up ally buffs extremely well
  • Absolutely dominates single-target fights
  • Enormous room left to grow

Cons

  • In long fights the team's Energy and HP can run dry after a few transformations
  • Extremely reliant on a genuinely good Relic set
  • Careless use of Taunt can lead to unwanted situations
  • Poor at AoE because his damage gets spread onto targets that do not need it

Best Phaseinon Build Guide

Phaseinon DPS Build

Best Light Cones

  • 1 Thus Burns the Dawn S1 Thus Burns the Dawn Performance: 133,63%

    This Light Cone completely covers Phaseinon’s low base ATK, since it carries 687 base ATK, the highest in the game right now. Every hit ignores 18% of the enemy’s DEF, and once Phaseinon transforms his damage output rises sharply.

    On top of that, while his Ultimate is active Phaseinon acts faster because he gains base SPD rather than just a temporary SPD buff. That lets him attack earlier and more often.

    This is the strongest option for Phaseinon, clearly ahead of every alternative.

    The amount of base SPD gained from this Light Cone varies from fight to fight. If the fight lets Phaseinon take many extra turns, the real value is higher than the listed figure. Conversely, if he gains almost no extra turns, it is lower. The rating above is calculated using the average number of turns Phaseinon can reach.

  • 2 On the Fall of an Aeon S5 On the Fall of an Aeon Performance: 100%

    It ramps up ATK and adds extra damage on Weakness Break. Phaseinon can break Weaknesses very easily thanks to his Weakness implant and high Toughness damage, and its buffs do not lose duration while he is transformed.

    Despite the low base ATK, this is still the top F2P option for Phaseinon.

  • 3 Something Irreplaceable S1 Something Irreplaceable Performance: 98.23%

    If On the Fall of an Aeon is being used on another character and you own Clara’s signature Light Cone, this is still a reasonable substitute. During his Ultimate, Phaseinon is attacked constantly while its buffs stay up for the entire duration, so this Light Cone delivers fairly good value.

  • 4 A Trail of Bygone Blood S5 A Trail of Bygone Blood Performance: 97.85%

    This Light Cone has a fairly solid damage multiplier for Phaseinon, and it also provides CRIT Rate, a very important stat for him if he has not reached 100% CRIT in combat. However, like On the Fall of an Aeon, its weakness is low base ATK.

    If you are short on CRIT Rate, this is a good substitute among the non signature options. Conversely, once you have enough CRIT, it falls behind the alternatives.

    If you do not have Sunday and struggle to hit maximum CRIT, this Light Cone beats On the Fall of an Aeon in quite a few situations.

Skill Priority

Skill > Ultimate = Talent = Basic ATK

Trace Priority

Ascension 2 Trace > Ascension 4 Trace > Ascension 6 Trace

Eidolon Priority

Eidolons 1 > Eidolons 2

Stat Targets

  • HP 3200+
  • DEF 1000+
  • ATK 2200 - 2600+
  • CRIT Rate Aim for 100%
  • CRIT DMG 150% or higher (before buffs)
  • SPD Base SPD / 1 SPD faster than Sunday/Bronya

While his Ultimate is active, Phaseinon gains no benefit from SPD% or flat SPD. For that reason, SPD is not considered a damage stat for Phaseinon.

That said, Phaseinon can still make very effective use of SPD tuning, especially alongside turn advancing characters such as Sunday or Bronya. This lets him build up Coreflame points faster and more consistently.

When building SPD, the most common approach is to make Phaseinon exactly 1 SPD faster than his supports. That way he can take 2 or more turns to generate Coreflame before his turn gets advanced.

For example:

  • Phaseinon: 136 SPD
  • Sunday: 135 SPD
  • Bronya: 134 SPD

This arrangement lets Phaseinon act first and then get his turn advanced by Sunday/Bronya, which generates Coreflame faster and more evenly.

Phaseinon Skills

Basic ATK

Stride to Deliverance

[Single Target]
Energy Generated20
Toughness Break Single Target: 10

Deals Physical DMG equal to 140% of Phaseinon’s ATK to one designated enemy.

Lv. 10

Upgrade Materials

Lv. 1 to Lv. 10

Let There Be Light

[Blast]
Energy Generated30
Toughness Break AoE: 20

Gains 2 point(s) of “Coreflame,” dealing Physical DMG equal to 375% of Phaseinon’s ATK to one designated enemy and Physical DMG equal to 150% of Phaseinon’s ATK to adjacent targets.

Lv. 15

Upgrade Materials

Lv. 1 to Lv. 15

He Who Bears the World Must Burn

[AoE]
Energy Generated5
Toughness Break Single Target: 30 / Blast: 15

Transforms into Khaslana. During the transformation, deploys the Territory “Ruinous Irontomb.” Within the Territory, other teammates depart and cannot take action, and all enemies have Physical Weaknesses.
Khaslana does not enter his own turn, but has 8 Khaslana’s extra turn(s), with a SPD set at 60% of Khaslana’s base SPD. When the last of Khaslana’s extra turns starts, immediately launches a final hit and deals Physical Ultimate DMG equal to 1200% of Khaslana’s ATK that is distributed evenly across all enemies.

Lv. 15

Upgrade Materials

Lv. 1 to Lv. 15

Pyric Corpus

[Enhance]
Energy Generated5

Phaseinon’s Talent. When “Coreflame” reaches 12 point(s), can activate Ultimate. Even after reaching the limit, can still hold up to 3 overflow point(s). When the transformation ends, gains “Coreflame” based on the number of overflow points.
When Phaseinon is targeted by an ability from any other target, gains 1 “Coreflame” point. And if the ability is cast by one of Phaseinon’s teammates, can also increase Phaseinon’s CRIT DMG by 38% for 3 turn(s).

Lv. 15

Upgrade Materials

Lv. 1 to Lv. 15

Beginning of the End

[Enhance]
Energy Generated5

While Phaseinon is in the team, increases Max Technique Points by 3.
When actively using this Technique, consumes 2 Technique Points and immediately attacks all enemies within a certain range. After entering combat, regenerates 0 Energy for allies and gains 0 “Scourge” and 1 Skill Point(s). Deals Physical DMG equal to 400% of Phaseinon’s ATK to all enemies at the start of each wave.
If attacking a normal enemy, immediately defeats them without entering combat. No Technique Points are consumed if no enemies are hit.

Lv. 15

Upgrade Materials

Lv. 1 to Lv. 15

Phaseinon Traces

Total Trace Bonuses
  • CRIT DMG +37.3%
  • CRIT Rate +12%
  • SPD +5

Phaseinon Eidolons

Fire and Light Bind Virtue and Vice
Eidolon 1

The base SPD inheritance ratio for Khaslana’s extra turn increases to 66%. For every enemy target defeated in one battle, additionally increases this ratio by 1.5%, up to a max of 84%.
When using Ultimate, increases CRIT DMG by 50%, lasting for 3 turn(s).

Sky and Earth Churn Mortal Froth
Eidolon 2

Khaslana’s Physical RES PEN increases by 20%. When one use of “Foundation: Stardeath Verdict” consumes 4 “Scourge” point(s), gains 1 extra turn.

Depths of Quiet, Entombed in Ruin
Eidolon 3

Ultimate Lv. +2, up to a maximum of Lv. 15.
Basic ATK Lv. +1, up to a maximum of Lv. 10.

Faces of Titans, Blurred by Time
Eidolon 4

When using “Calamity: Soulscorch Edict,” additionally gains 4 stack(s) of “Soulscorch.”

The Wheel Spins Forevermore
Eidolon 5

Skill Lv. +2, up to a maximum of Lv. 15.
Talent Lv. +2, up to a maximum of Lv. 15.

Embers of Old Rise Still
Eidolon 6

The number of overflow points allowed for “Coreflame” no longer has an upper limit. When the battle starts, gains 6 point(s) of “Coreflame.”
After using the attack from “Foundation: Stardeath Verdict,” additionally deals True DMG equal to 36% of the total DMG dealt in this attack to the enemy target with the highest HP.