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E.G.O 0209 · HE

Command : Meltdown

FaustGluttonyKal'tsit (Arknights)Collaboration event exclusive

Risk Level: HE
SP Cost: 20/25/38
Resource Cost: Sloth ×1Gluttony ×5Pride ×2E.G.O usable with these resources →
Resistance: ×0.75×2×2×0.5×1×1×1

GUIDEMechanics and How to Use

At a Glance

A Gluttony-heavy healing E.G.O that keeps up Hardened Shell-Barrier to heal allies automatically every turn (collaboration-limited).

Core Mechanics

HP recovery: After the attack, heals herself and the 1 ally with the lowest HP ratio by a percentage of her own max HP, 30% at Threadspin Ⅳ. If her own HP is full, it heals 2 allies.
Hardened Shell-Barrier: Gains Hardened Shell-Barrier after the attack, 10 at Threadspin Ⅳ, up to 10. Right before taking damage, half of it is spent and turned into Protection, but the spent amount also lowers the healing.
Passive — Doctor: At Turn Start, heals allies by (Shield value)% of her max HP. ×1.5 if the target is at 25% HP or less or staggered. If this was the last E.G.O she used, the Shield's Turn End decrease drops from 3 to 1.
SP recovery: Restores SP to the 2 allies with the lowest SP, including herself, 15 at Threadspin Ⅳ.
Offense: Gains Final Power against targets with Rupture or Burn, and more damage based on Rupture. The latter is ×1.5 with Hardened Shell-Barrier, or ×2 at Threadspin Ⅳ.

How to Use

Use it early in the fight, keep the Shield up, and keep the automatic healing running.
Using another E.G.O makes the Shield drop by 3 every turn, so pay attention to the order of use.
The Corrosion skill cannot distinguish friend from foe and does not heal; if it fails to stagger or kill an enemy, she spends her own HP to gain a large Shield, making it defensive in nature.

A practical guide based on the skill and passive descriptions below.(Updated: 2026-10-18)

ANALYSISThreadspin

Ⅱ: Unlocks the passive Doctor.
Ⅲ: Increases power, healing, and Shield, and the Rupture damage bonus with Shield becomes ×1.5.
Ⅳ: Healing and Shield reach their maximum, the cap on the Rupture damage bonus rises, and it becomes ×2 with Shield.

SKILLSSkill

Awakening

Awakening skill

Pierce

Clash Power: 17~3014~27 → 17~30
Base Power: 1714 → 17
Coin Power: +13
No. of Coins: 1
Skill Level: Identity Lv+2
Attack Weight: 3

If the main target has or , Final Power +1/+2/+3

Before Attack Deal +1% damage for every 1 ( Potency + Count) on the main target (max 15%/25%)

[Attack End] Gain 4/7/10

[Attack End] Heal self and 1 ally with the least HP percentage by 15%/20%/30% of this unit's max HP

- If this unit is at max HP, heal 2 other allies instead

[Attack End] Heal 10/15 SP for 2 allies, including this unit, with the lowest SP

- If this unit has , multiply this effect and its maximum cap by 1.5/2

ⅠOn Hit Inflict 1/2/3

On Hit Inflict 1/2/3

Corrosion

Corrosion skill

Slash

Clash Power: 3~192~14 → 3~19
Base Power: 32 → 3
Coin Power: +4+3 → +4
No. of Coins: 4
Skill Level: Identity Lv+4
Attack Weight: 3

Indiscriminate

Targets randomly

Before Attack At 4+ highest Reson., gain +1 Atk Weight/Before Attack At 3+ highest Reson., gain +1 Atk Weight/Before Attack Gain +1 Atk Weight for every 3 highest Reson. (max 2)

[Attack End] Gain 4/7/10

[Attack End] If this Skill's damage did not Stagger or kill any target, take HP damage equal to 20% of this unit's max HP, and gain Shield equal to (HP damage taken due to this effect x 2)

- This damage does not kill this unit. Max out the Stack at Turn End and gain 2 next turn (once per turn)

If main target has 6+ ( Potency + Count), Base Power +1/Base Power +1 for every 6 ( Potency + Count) on the main target (max 2)

ⅠOn Hit Inflict 1

ⅡOn Hit Inflict 1

Ⅲ

On Hit Inflict +1/+2 Count

Ⅳ

On Hit Inflict 1/2/3

[Coin Start] If this Skill's damage did not Stagger or kill any target, deal +30% damage

Normal Coin Unbreakable CoinThreadspin Ⅲ Threadspin Ⅳ mark additions or changes at those Threadspin tiers. Multiple values represent different tiers; the larger value is for the highest tier.

PASSIVEE.G.O Passives

E.G.O Passives

Doctor

Turn Start: heal self and 1 ally with the lowest HP percentage by ( Stack)% of this unit's max HP

- If this unit is at max HP, heal 2 other allies with the lowest HP percentages instead

- If the heal-receiving units are at 25% or lower HP, or are Staggered, multiply this effect's healing by 1.5

Turn End: if the last E.G.O Skill Faust used during this Encounter was Command : Meltdown, lose only 1 Stack of at Turn End instead

- This effect activates in the same turn the E.G.O Skill is used

SYNERGYTeams and Synergies

Heishou Pack - Mao Branch Adept: Sloth S1, Gluttony S3, and Pride S2 supply all three required affinities, and she also inflicts Rupture.
Seven Assoc. South Section 4: Has a Gluttony S3, and S1–S3 inflict Rupture, which fits its Rupture-scaling attack.

Team Builds That Suit This E.G.ORupture Team

KEYWORDSEffect Glossary

Burn: At the end of the turn, take fixed damage by the effect’s Potency. Then, reduce its Count by 1.
Rupture: When hit by an attack, take fixed damage by the effect’s Potency. Then, reduce its Count by 1.
Hardening: Turn Start: At 3+ Count, the Arms change into a “perfect” state.
Hardened Shell-Barrier: - Turn Start: gain (Stack / 3) Defense Level Up (max 3; rounded down) - Immediately before getting hit by an enemy, consume half of Hardened Shell-Barrier and gain Protection equal to the Stack consumed (once per turn, rounded up) - Turn End: lose 3 Stack - Max Stack: 10
Damage Up: Deal more damage with skills based on the effect’s Count for one turn. (Max 10)
Unbreakable Coin: - This coin does not break upon Clash Lose. - If an Attack Skill has this Coin, attack with this Coin after getting hit. - Upon Clash Lose, fix the Coin Power of the unbroken Coin to 1