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E.G.O 0810 · HE

Tidal Elegy

IshmaelGloomSkadi (Arknights)Collaboration event exclusive

Risk Level: HE
SP Cost: 20/25/38
Resource Cost: Gloom ×4Pride ×2E.G.O usable with these resources →
Resistance: ×1×2×2×1×0.5×0.75×1

GUIDEMechanics and How to Use

At a Glance

A 3-Attack-Weight Gloom Blunt E.G.O whose damage doubles against a single enemy and grows with Gloom Resonance and against enemies with weak Gloom resistance.

Core Mechanics

Single-target bonus: With 1 target, +2 Coin Power and +100% damage (judged by the main body in Focused Encounters). It can be fired at multiple enemies, but the gain is larger against a single target.
Gloom bonuses: At 2 or more Gloom Resonance, +5% damage per Resonance (8% at Threadspin Ⅲ, 10% at Ⅳ). The more the main target's Gloom resistance exceeds 1, the more damage increases further.
Using Sinking: On use, +1 Clash Power if the main target has at least 4 Sinking (per 4 at Threadspin Ⅳ, up to 2). Inflicts Sinking and Tremor on hit.
Unbreakable Coins: All 3 Coins are Unbreakable. If a target is staggered or similar at the third Coin, it inflicts Sinking on another enemy.
Passive — Abyssal Dance: If there is only 1 enemy at Combat Start, her leftmost attack skill gains +1 Clash Power and +11.5% damage on hit after a Clash Win.

How to Use

Fire it at a boss weak to Gloom in a Gloom-heavy team. Even enemies with multiple parts count as "1" by the main body, so they are treated as single targets.
When the attack defeats an enemy, Gloom damage equal to half of each target's Sinking Potency (up to 15) spreads to 2 random enemies.
At Threadspin Ⅳ, the Corrosion skill reaches nearly its maximum enhancement at 4 Gloom Resonance.

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

ANALYSISThreadspin

Ⅱ: Unlocks Abyssal Dance.
Ⅲ: Raises the Resonance- and resistance-based damage increases, and Sinking and Tremor infliction become 2.
Ⅳ: Further raises the damage increases, with 3 Sinking and Tremor and 2 Bind. The Clash Power bonus also rises.

SKILLSSkill

Awakening

Awakening skill

Blunt

Clash Power: 8~20
Base Power: 8
Coin Power: +4
No. of Coins: 3
Skill Level: Identity Lv+3
Attack Weight: 3

If there is 1 target, Coin Power +2 and damage +100% (judged by the main body in Focused Encounters)

On Use Clash Power +1 if/per 4+ on the main target (max 2)

Before Attack If the main target's Gloom resistance exceeds 1, damage +2/3/5% per 0.1 over (max 10/15/20%)

Before Attack At 2+ Gloom Resonance, damage +5/8/10% per 1 Gloom Resonance (max 20/32/40%)

After Attack If 1 or more targets died, deal Gloom damage to 2 random enemies equal to (each target's Potency÷2) (max 15. Applied first to targets with the most Potency)

Ⅰ

On Hit Inflict 1/2/3

Ⅱ

On Hit without being broken Inflict 1/2 next turn

Ⅲ

On Hit If any target was Staggered, had a part destroyed, or died, inflict 2 on 1 random non-target enemy (1 time per 1 turn. Parts count as 1 target in Focused Encounters)

-If there is 1 target, inflict on 3 enemies instead

On Hit . Reduce the target's Count by 1

Corrosion

Corrosion skill

Blunt

Clash Power: 1~13
Base Power: 13
Coin Power: -3
No. of Coins: 4
Skill Level: Identity Lv+5
Attack Weight: 3

Indiscriminate

Attacks random targets

On Use Clash Power +1 if/per 5+ on the main target (max 2/3)

Before Attack Apply the following effects per 3 of the highest Resonance (for a Gloom Resonance, the requirement drops to 2)

-Attack Weight +1 (max 2)

-Damage +15% (max 30%)

After Attack Give 1 Blunt DMG Up next turn to (highest Resonance) random allies (max 4 including this unit. 1 time per 1 turn)

-If that Resonance is a Gloom Resonance or Absolute Resonance, also give 1 Gloom DMG Up

ⅠOn Hit Inflict 1

ⅡOn Hit Inflict 1/2

ⅢOn Hit Inflict 1

ⅣOn Hit Inflict 1/2

On Hit If any target was Staggered, had a part destroyed, or died, inflict 1 Gloom Fragility next turn on 1 random non-target enemy (1 time per 1 turn. Parts count as 1 target in Focused Encounters)

On Hit . Reduce the target's Count by 1

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

Abyssal Dance

-At Combat Start, if there is only 1 enemy, own attack skill at the far left of the control panel gains Clash Power +1 and +11.5% damage on hit after Clash Win (including E.G.O skills)

-On the turn this unit returns or leaves Standby, own minimum and maximum Speed +1 and Clash Power +1

※Unlocked at Threadspin Ⅱ; active from the turn after E.G.O use until the end of battle

SYNERGYTeams and Synergies

Molar Boatworks Fixer: S1 (Pride) and S3 (Gloom) supply the required affinities, and she can inflict Sinking (her Tremor stacks on herself).
Jeong's Office Rep: S3 (Gloom) and her Defense skill (Pride) supply the required affinities, and she can inflict Sinking (her Tremor stacks on herself).

KEYWORDSEffect Glossary

Sinking: When hit by an attack skill, take fixed SP damage equal to the Potency (converted to Gloom damage for Abnormalities). After taking damage, reduce Count by 1.
Unbreakable Coin: This Coin is not destroyed on Clash Lose. If an attack skill contains this Coin, attack with it after taking damage. On Clash Lose, the Power of the remaining unbroken Coin becomes 1.
Tremor: When taking damage from a skill that triggers Tremor Burst, raise the Stagger Threshold by the Potency. At Turn End, reduce Count by 1.
Bind: For 1 turn, decrease Speed by the value.
Tremor Burst: Raise the target's Stagger Threshold by their Tremor Potency.
Damage Up: For 1 turn, increase damage dealt with skills proportional to the value (max 10).
Fragile: For 1 turn, damage taken from skills increases in proportion to this value (maximum 10).