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Xaihi, Cryo Supporter operator | Arknights: Endfield

Cabal of Tranquility

Xaihi

Build guide · Arknights: Endfield

5-star
CryoSupporterArts UnitSupport

English voice: Elsie Lovelock

The best Xaihi build in Arknights: Endfield (Version 1.6) is Detonation Unit with Eternal Xiranite. Updated

Key facts

Xaihi is a 5-star Cryo Supporter operator from Cabal of Tranquility, wielding a Arts Unit. Support / Sustain build, skill scalings, promotion and skill…

Rarity
5★
Attribute
Cryo
Class
Supporter
Weapon type
Arts Unit
Faction
Cabal of Tranquility
Released
Version 1.0 · 2026-01-22
Best weapon
Detonation Unit
Core set
Eternal Xiranite
Tier list
T0

Arknights: Endfield 5★ Cryo Supporter Support

Xaihi build summary

Updated November 6, 2026

Detonation Unit tops the weapon ranking for Xaihi at P0, ahead of Chivalric Virtues, Stanza of Memorials and Junction Point. That order is prydwen.gg's, measured in play and condensed to a sentence each; every row of it sits under Weapons below.

Run Eternal Xiranite on Xaihi, with No Set behind it.

Skill priority is ULTIMATE >= BATTLE SKILL > COMBO SKILL = BASIC ATTACK. The Ultimate costs 80 Ultimate Energy, which is what an Ultimate Gain Efficiency target has to clear.

Xaihi plays Supporter · Amp and HP treatment in the Arcane team, alongside Arcane, Tangtang and Akekuri.

Role
Support / Sustain
Best weapon
Detonation Unit
Gear set
Eternal Xiranite
Skill priority
ULTIMATE >= BATTLE SKILL > COMBO SKILL = BASIC ATTACK
Best team
Arcane, Tangtang, Xaihi, Akekuri
Ultimate Energy cost
80 Ultimate Energy
Key promotion material
8× Bloodcap
Last updated
November 6, 2026
Full Xaihi build: weapons, gear and teams

Skills

Xaihi Cooldown, Basic Attack icon | Arknights: Endfield
Basic

Cooldown

BASIC ATTACK: An attack with up to 5 sequences that deals Cryo DMG. As the controlled operator, Final Strike also deals 15 Stagger. DIVE ATTACK: Basic attack performed in mid-air becomes a dive attack that deals Cryo DMG to nearby enemies. FINISHER: Basic attack performed near a Staggered enemy becomes a finisher attack that deals massive Cryo DMG and recovers some SP.

Skill level

BATK SEQ 1 Multiplier
34%
BATK SEQ 2 Multiplier
36%
BATK SEQ 3 Multiplier
47%
BATK SEQ 4 Multiplier
74%
BATK SEQ 5 Multiplier
124%
Finisher ATK Multiplier
900%
Dive ATK Multiplier
180%
All 12 levels
Scaling123456789101112
BATK SEQ 1 Multiplier15%17%18%20%21%23%24%26%27%29%31%34%
BATK SEQ 2 Multiplier16%18%19%21%22%24%26%27%29%31%33%36%
BATK SEQ 3 Multiplier21%23%25%27%29%32%34%36%38%40%44%47%
BATK SEQ 4 Multiplier33%36%40%43%46%50%53%56%59%64%68%74%
BATK SEQ 5 Multiplier55%61%66%72%77%83%88%94%99%106%114%124%
Finisher ATK Multiplier400%440%480%520%560%600%640%680%720%770%830%900%
Dive ATK Multiplier80%88%96%104%112%120%128%136%144%154%166%180%
Xaihi Distributed DoS, Battle Skill icon | Arknights: Endfield
Skill

Distributed DoS

  • 100 SP

Summons an Auxiliary Crystal that orbits the operator for a while. When the controlled operator performs a Final Strike on the enemy, the Auxiliary Crystal restores the said operator's HP. This effect can trigger 2 times. The attribute of Will increases the amount of HP treatment. When the controlled operator is already at Max HP when triggering the HP restoration, grant the said operator a temporary Arts Amp instead. This effect cannot stack.

Skill level

SP Cost
100
Base Treatment
324
Treatment Increase per Will
0.76
Auxiliary Crystal Duration (s)
20
Arts Amp
15%
Arts Amp Duration (s)
25
All 12 levels
Scaling123456789101112
SP Cost100100100100100100100100100100100100
Base Treatment144173202230245259274288302310317324
Treatment Increase per Will0.340.40.470.540.570.60.640.670.710.720.740.76
Auxiliary Crystal Duration (s)202020202020202020202020
Arts Amp9%9%9%9%9%11%11%11%13%13%13%15%
Arts Amp Duration (s)252525252525252525252525
Xaihi Stress Testing, Combo Skill icon | Arknights: Endfield
Combo

Stress Testing

  • 8s cooldown

Quickly charges up the Auxiliary Crystal and launches it at the enemy to deal Cryo DMG and Cryo Infliction. Trigger: When the Auxiliary Crystal uses up its HP treatments.

Skill level

Cooldown
7
DMG Multiplier
450%
Stagger
10
Ultimate Energy Gain
10
All 12 levels
Scaling123456789101112
Cooldown888888888887
DMG Multiplier200%220%240%260%280%300%320%340%360%385%415%450%
Stagger101010101010101010101010
Ultimate Energy Gain101010101010101010101010
Xaihi Stack Overflow, Ultimate icon | Arknights: Endfield
Ultimate

Stack Overflow

  • 80 Ultimate Energy

Applies temporary Cryo Amp and Nature Amp to the entire team. The attribute of Intellect increases the Amp effect.

Skill level

Ultimate Energy Cost
80
Base Cryo Amp
24%
Base Nature Amp
24%
Amp Increase per Intellect
0.03%
MAX Amp from INT
36%
Duration (s)
12
All 12 levels
Scaling123456789101112
Ultimate Energy Cost808080808080808080808080
Base Cryo Amp11%12%13%14%15%16%17%18%19%21%22%24%
Base Nature Amp11%12%13%14%15%16%17%18%19%21%22%24%
Amp Increase per Intellect0.014%0.015%0.016%0.018%0.019%0.02%0.022%0.023%0.024%0.026%0.028%0.03%
MAX Amp from INT30%30%30%30%30%30%30%30%30%30%30%36%
Duration (s)121212121212121212121212

Talents

  1. Xaihi Stalwart, talent icon | Arknights: EndfieldElite 1

    Stalwart

    1. Elite 1

      Operator Will +10.

    2. Elite 2

      Operator Will +15.

    3. Elite 3

      Operator Will +15.

    4. Elite 4

      Operator Will +20.

  2. Xaihi Execute Process, talent icon | Arknights: EndfieldElite 1

    Execute Process

    1. Elite 1

      Combo skill Stress Testing improved: Hitting an enemy with Cryo Infliction or Solidification also causes the enemy to suffer Cryo DMG Taken +7% for 5s. This effect cannot stack.

    2. Elite 2

      Combo skill Stress Testing improved: Hitting an enemy with Cryo Infliction or Solidification also causes the enemy to suffer Cryo DMG Taken +10% for 5s. This effect cannot stack.

  3. Xaihi Freeze Protocol, talent icon | Arknights: EndfieldElite 3

    Freeze Protocol

    1. Elite 3

      Ultimate Stack Overflow improved: The ultimate also dispels Cryo Infliction and Solidification from the entire team.

  4. Xaihi Outfitting, talent icon | Arknights: EndfieldElite 1

    Outfitting

    1. Elite 1

      Activate this to let the operator equip blue quality gear

    2. Elite 2

      Activate this to let the operator equip purple quality gear

    3. Elite 3

      Activate this to let the operator equip gold quality gear

Stat talent

Will
60

Stalwart at full unlock, summed across every tier. Elite rank gates the tiers as it gates the talents above.

Potentials

  1. Xaihi P1 Agile Execution, Potential | Arknights: EndfieldP1

    Agile Execution

    Arts Amp granted by the Auxiliary Crystal is increased by another 5%.

  2. Xaihi P2 Link Aggregation, Potential | Arknights: EndfieldP2

    Link Aggregation

    Ultimate Stack Overflow improved: Ultimate Energy cost -10%.

  3. Xaihi P3 Mapping Node, Potential | Arknights: EndfieldP3

    Mapping Node

    Combo skill Stress Testing improved: When hitting the target, the hit chains 1 time to 1 additional target nearby.

  4. Xaihi P4 Grayscale Release, Potential | Arknights: EndfieldP4

    Grayscale Release

    Intellect +15, Treatment Efficiency +10%.

  5. Xaihi P5 Controlled Recursion, Potential | Arknights: EndfieldP5

    Controlled Recursion

    Ultimate Stack Overflow improved: Amp effect is increased to 1.1 times the original.

Full bill

Level 90 and every skill at 12

814,900

T-Creds 15 material lines

Elite 4 and level 90

126,100

T-Creds 7 materials · 4 steps

All 4 skills at 12

688,800

T-Creds 4× the single-skill bill

Elite promotion

  1. Elite 1
    Pink Bolete, promotion material | Arknights: EndfieldPink Bolete ×3
    Protodisk, promotion material | Arknights: EndfieldProtodisk ×8

    1,600T-Creds

  2. Elite 2
    Red Bolete, promotion material | Arknights: EndfieldRed Bolete ×5
    Protodisk, promotion material | Arknights: EndfieldProtodisk ×25

    6,500T-Creds

  3. Elite 3
    Protoset, promotion material | Arknights: EndfieldProtoset ×24
    Ruby Bolete, promotion material | Arknights: EndfieldRuby Bolete ×5

    18,000T-Creds

  4. Elite 4
    Bloodcap, promotion material | Arknights: EndfieldBloodcap ×8
    D96 Steel Sample 4, promotion material | Arknights: EndfieldD96 Steel Sample 4 ×20
    Protoset, promotion material | Arknights: EndfieldProtoset ×36

    100,000T-Creds

Total to level 90

126,100 T-Creds

Bloodcap, promotion material | Arknights: EndfieldBloodcap ×8
D96 Steel Sample 4, promotion material | Arknights: EndfieldD96 Steel Sample 4 ×20
Pink Bolete, promotion material | Arknights: EndfieldPink Bolete ×3
Protoset, promotion material | Arknights: EndfieldProtoset ×60
Red Bolete, promotion material | Arknights: EndfieldRed Bolete ×5
Ruby Bolete, promotion material | Arknights: EndfieldRuby Bolete ×5
Protodisk, promotion material | Arknights: EndfieldProtodisk ×33

Skill materials

  1. → 2
    Kalkodendra, promotion material | Arknights: EndfieldKalkodendra ×1
    Protoprism, promotion material | Arknights: EndfieldProtoprism ×6

    1,000T-Creds

  2. → 3
    Kalkodendra, promotion material | Arknights: EndfieldKalkodendra ×2
    Protoprism, promotion material | Arknights: EndfieldProtoprism ×12

    2,700T-Creds

  3. → 4
    Chrysodendra, promotion material | Arknights: EndfieldChrysodendra ×1
    Protoprism, promotion material | Arknights: EndfieldProtoprism ×16

    3,200T-Creds

  4. → 5
    Chrysodendra, promotion material | Arknights: EndfieldChrysodendra ×1
    Protoprism, promotion material | Arknights: EndfieldProtoprism ×21

    4,200T-Creds

  5. → 6
    Chrysodendra, promotion material | Arknights: EndfieldChrysodendra ×2
    Protoprism, promotion material | Arknights: EndfieldProtoprism ×27

    5,400T-Creds

  6. → 7
    Protohedron, promotion material | Arknights: EndfieldProtohedron ×6
    Vitrodendra, promotion material | Arknights: EndfieldVitrodendra ×1

    8,200T-Creds

  7. → 8
    Protohedron, promotion material | Arknights: EndfieldProtohedron ×8
    Vitrodendra, promotion material | Arknights: EndfieldVitrodendra ×1

    10,500T-Creds

  8. → 9
    Protohedron, promotion material | Arknights: EndfieldProtohedron ×15
    Vitrodendra, promotion material | Arknights: EndfieldVitrodendra ×2

    18,000T-Creds

  9. → 10
    Blighted Jadeleaf, promotion material | Arknights: EndfieldBlighted Jadeleaf ×3
    Mark of Perseverance, promotion material | Arknights: EndfieldMark of Perseverance ×1
    Quadrant Fitting Fluid, promotion material | Arknights: EndfieldQuadrant Fitting Fluid ×6
    Protohedron, promotion material | Arknights: EndfieldProtohedron ×15

    24,000T-Creds

  10. → 11
    Blighted Jadeleaf, promotion material | Arknights: EndfieldBlighted Jadeleaf ×6
    Mark of Perseverance, promotion material | Arknights: EndfieldMark of Perseverance ×2
    Quadrant Fitting Fluid, promotion material | Arknights: EndfieldQuadrant Fitting Fluid ×16
    Protohedron, promotion material | Arknights: EndfieldProtohedron ×24

    30,000T-Creds

  11. → 12
    Blighted Jadeleaf, promotion material | Arknights: EndfieldBlighted Jadeleaf ×12
    Mark of Perseverance, promotion material | Arknights: EndfieldMark of Perseverance ×3
    Quadrant Fitting Fluid, promotion material | Arknights: EndfieldQuadrant Fitting Fluid ×36
    Protohedron, promotion material | Arknights: EndfieldProtohedron ×50

    65,000T-Creds

One skill at 12

172,200 T-Creds

Blighted Jadeleaf, promotion material | Arknights: EndfieldBlighted Jadeleaf ×21
Mark of Perseverance, promotion material | Arknights: EndfieldMark of Perseverance ×6
Quadrant Fitting Fluid, promotion material | Arknights: EndfieldQuadrant Fitting Fluid ×58
Chrysodendra, promotion material | Arknights: EndfieldChrysodendra ×4
Kalkodendra, promotion material | Arknights: EndfieldKalkodendra ×3
Protohedron, promotion material | Arknights: EndfieldProtohedron ×118
Vitrodendra, promotion material | Arknights: EndfieldVitrodendra ×4
Protoprism, promotion material | Arknights: EndfieldProtoprism ×82

All 4 skills at 12

688,800 T-Creds

Blighted Jadeleaf, promotion material | Arknights: EndfieldBlighted Jadeleaf ×84
Mark of Perseverance, promotion material | Arknights: EndfieldMark of Perseverance ×24
Quadrant Fitting Fluid, promotion material | Arknights: EndfieldQuadrant Fitting Fluid ×232
Chrysodendra, promotion material | Arknights: EndfieldChrysodendra ×16
Kalkodendra, promotion material | Arknights: EndfieldKalkodendra ×12
Protohedron, promotion material | Arknights: EndfieldProtohedron ×472
Vitrodendra, promotion material | Arknights: EndfieldVitrodendra ×16
Protoprism, promotion material | Arknights: EndfieldProtoprism ×328

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