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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

When attacking just a single target(in Focused Encounters, a Core and its connected Parts count as a single target), Coin Power +2 and deal +100% damage

On Use If the main target has 4+ , Clash Power +1/On Use Clash Power +1 for every 4 on the main target (max 2)

Before Attack If the main target has higher than 1 Gloom Resist., deal +2%/+3%/+5% damage for every 0.1 excess Resist. (max 10%/15%/20%)

Before Attack At 2+ Gloom Reson., deal +5%/+8%/+10% damage for every Gloom Reson. (max 20%/32%/40%)

[Attack End] If 1 or more targets are killed, deal ( Potency on each target / 2) Gloom damage against 2 random enemies (max 15; prioritizes targeted enemies with the most Potency)

Ⅰ

On Hit Inflict 1/2/3

Ⅱ

On Hit without Cracking Inflict 1/2 next turn

Ⅲ

On Hit If there are Staggered, Part broken, or killed units among the targets, inflict 2 against a random non-targeted enemy (once per turn; in Focused Encounters, each Part count as 1 target)/On Hit If there are Staggered, Part broken, or killed units among the targets, inflict 2 against a random non-targeted enemy (once per turn; for Focused Encounters, each Part count as 1 target)/On Hit If there are Staggered, Part broken, or killed units among the targets, inflict 2 against a random non-targeted enemy (once per turn; in Focused Encounters, each Part count as 1 target)

- If there is just a single target, apply it to 3 targets instead/- When attacking just a single target, apply it to 3 targets instead

On Hit Trigger ; then, reduce 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

Targets randomly

On Use If main target has 5+ , Clash Power +1/On Use Clash Power +1 for every 5 on the main target (max 2)/On Use Clash Power +1 for every 5 on the main target (max 3)

Before Attack Gain the following effects for every 3 highest Reson. (if it was a Gloom Reson., for every 2 highest Reson.)

- Gain +1 Atk Weight (max 2)

- Deal +15% damage (max 30%)

[Attack End] Apply 1 next turn to (highest Reson.) random allies (including this unit; max 4 allies; once per turn)

- If the said Reson. was a Gloom Reson. or an A-Reson., apply 1 as well

ⅠOn Hit Inflict 1

ⅡOn Hit Inflict 1/2

ⅢOn Hit Inflict 1

ⅣOn Hit Inflict 1/2

On Hit Trigger ; then, reduce target's Count by 1

On Hit If there are Staggered, Part broken, or killed units among the targets, inflict 1 next turn against a random non-targeted enemy (once per turn; for Focused Encounters, each Part counts as 1 target)

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

- Combat Start: if there is just a single enemy, this unit's leftmost Attack Skill on the Dashboard gains Clash Power +1, and deals +11.5% damage on Hit after Clash Win (including E.G.O Skills)

- For the turns in which this unit Returned or Substituted in: Min & Max Speed +1, Clash Power +1

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

Bind: Speed decreases by the effect’s Count for one turn.
Tremor: When attacked by skills that trigger Tremor Burst, raise the Stagger Threshold by the effect’s Potency. At the end of the turn, reduce the Count by 1.
Sinking: When hit by an attack, take fixed SP damage by the effect’s Potency. (Non-SP Units take Gloom damage instead.) Then, reduce its Count by 1.
Tremor Burst: Raise target's Stagger Threshold by Tremor Potency on target
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
Dejection: - Low Morale - In a clash, if any Coin lands tails, Clash Power -1 for the clash
Fragile: Take more damage from skills based on the effect’s Count for one turn. (Max 10)
Damage Up: Deal more damage with skills based on the effect’s Count for one turn. (Max 10)
Blunt DMG Up: Deal more damage with Blunt skills based on the effect’s Count for one turn. (Max 10)
Gloom DMG Up: Deal more damage with Gloom skills based on the effect’s Count for one turn. (Max 10)
Gloom Fragility: Take more damage from Gloom skills based on the effect’s Count for one turn. (Max 10)