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Solemn Lament Yi Sang E.G.O artwork

E.G.O 0109 · HE

Solemn Lament

Yi SangGloomFuneral of the Dead Butterflies (Lobotomy Corporation / Library of Ruina)Walpurgisnacht event exclusive
Risk Level
HE
SP Cost
20/25/38
Resource Cost
Sloth ×1Gloom ×4Pride ×2E.G.O usable with these resources →
Resistance
×1×1×0.75×2×0.5×1×2

GUIDEMechanics and How to Use

At a Glance

A 5-Coin E.G.O that distributes attacks across multiple targets and chiefly serves as an upgrade for Lobotomy E.G.O:: Solemn Lament Yi Sang, granting him special benefits including Tremor application.

Core Mechanics

  • Passive (unlocked at Threadspin Ⅱ): While equipped at this tier, Solemn Lament Yi Sang's Base Skills inflict 2 Tremor on hit, once per skill; both the Identity and his Base Skills count as inflicting Sinking and Tremor. The following additional benefits activate from the turn after using the E.G.O: his ammunition cap for The Living & The Departed increases by 10. After Reloading, restores 10 SP and Discards 1 Base Attack Skill, up to 2 times per turn. Equipping a defense skill also restores 10 SP at Turn End.
  • Applying and spending Butterfly: Coins Ⅰ–Ⅳ randomly apply Butterfly to their targets on hit, in amounts of 1, 2, 2, and 3. Coin Ⅴ consumes all of his own ammunition, The Living & The Departed, inflicts 3 Sinking and 3 Tremor, and triggers Tremor Burst. Butterfly on the target and Yi Sang's own ammunition are separate resources.
  • Damage from Threadspin upgrades: Threadspin Ⅲ adds Gloom damage on Coin Ⅴ based on all Butterfly on the target. Threadspin Ⅳ adds Gloom Fragility and Gloom Resist Down to Coin Ⅳ, plus Sinking Count increases on Coins Ⅰ–Ⅳ.
  • Benefits exclusive to Solemn Lament Yi Sang: Before attacking, that Identity gains ammunition equal to Gloom Resonance + 1, up to 7, then Reloads after attacking. Reloading costs SP equal to (30 − remaining ammunition) ÷ 2.

How to Use

  • The passive unlocked at Threadspin Ⅱ is its main value. Treat the attack itself as a secondary benefit of activating this upgrade.
  • Since Butterfly is applied to targets, focusing on one enemy can improve the payoff. The skill expends ammunition and Reloads, so use it with SP to spare.
  • All Coins are Unbreakable. Its Clash range is 6–16, or 6–21 at Threadspin Ⅳ. Threadspin Ⅳ also adds +1 Clash Power per 4 combined Sinking Potency and Butterfly on the main target, up to +4.
  • Costs 1 Sloth, 4 Gloom, and 2 Pride. SP cost: 20 Awakening, 25 Corrosion, 38 Overclock.
  • Sin resistances: Fatal to Gluttony and Envy (×2); Ineffective against Gloom (×0.5).

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

ANALYSISThreadspin

  • Ⅱ: Unlocks the passive: equipping it grants Solemn Lament Yi Sang Tremor application; the other listed benefits begin the turn after E.G.O use.
  • Ⅲ: Adds Butterfly-based Gloom damage to Coin Ⅴ.
  • Ⅳ: Adds Gloom Fragility and Gloom Resist Down, raises Coin Power from +2 to +3, and adds the Clash Power condition, substantially improving the E.G.O.

SKILLSSkill

Awakening

Awakening skill

PiercePierce
Clash Power
6~216~16 → 6~21
Base Power
6
Coin Power
+3+2 → +3
No. of Coins
5
Skill Level
Identity Lv+4
Attack Weight
3

When inflicting Butterfly using this Skill's effects: (Chance to flip Heads)% chance to inflict The Departed. If this unit did not inflict The Departed, inflict The Living instead. (calculates every Butterfly Stack independently)

If Lobotomy E.G.O::Solemn Lament Yi Sang used this Skill:

- Before Attack Gain a random assortment of (Gloom Reson. + 1) The Living & The Departed (max 7)

- [Attack End]

Clash Power +1 for every 4 ( + both Butterfly) on the main target (max 4)

Ⅰ

On Hit Inflict 1 random Butterfly

On Hit Inflict +1 Count

Ⅱ

On Hit Inflict 2 random Butterfly

On Hit Inflict +1 Count

Ⅲ

On Hit Inflict 2 random Butterfly

On Hit Inflict +1 Count

Ⅳ

On Hit Inflict 3 random Butterfly

On Hit Inflict +1 Count

On Hit Inflict 1 and 1 , this turn and next turn

Ⅴ

Spend all The Living & The Departed on self

On Hit Inflict 3

On Hit Inflict 3

On Hit Inflict 2 Butterfly(The Living)

On Hit Inflict 2 Butterfly(The Departed)

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

On Hit Deal Gloom damage equal to the sum of both Butterfly on target

On Hit Deal Gloom damage equal to (The Living & The Departed spent by this Coin x 2)% of this Coin's final damage

Corrosion

Corrosion skill

PiercePierce
Clash Power
7~16
Base Power
16
Coin Power
-3
No. of Coins
3
Skill Level
Identity Lv+4
Attack Weight
3

Indiscriminate

Targets randomly

Before Attack Gain +(highest Reson. / 2) Atk Weight (max 2, rounded down)

Before Attack Base Power -2 for every Cracked Coin (max -6)

Clash Power +1 for every 4 ( + both Butterfly) on the main target (max 4)

Ⅰ

On Hit Inflict 3 Butterfly(The Living)

Ⅱ

On Hit Inflict 3 Butterfly(The Departed)

On Hit Inflict 1 and 1 , this turn and next turn

Ⅲ

On Hit Inflict 5

On Hit Inflict 5

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

On Hit Deal Gloom damage equal to the sum of both Butterfly on target

On Hit Deal Gloom damage equal to on 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

TheWilt-wingedButterflyFeedsUpon ThePauperDewInMistedBreath

If target has Butterfly, Clash Power +1

On Hit against targets that have 15+ ( + both Butterfly), inflict 1 Butterfly(The Living) and 1 Butterfly(The Departed) (once per turn; for Focused Encounters, the Part)

[Always Active - Lobotomy E.G.O::Solemn Lament Yi Sang Exclusive Effect]

On Hit, Base Skills inflict 2 on target (once per Skill)

This Identity counts as an "Identity that inflicts and "

- This Identity's Base Skills count as "Skills that inflict and "

[Effect on Use - Lobotomy E.G.O::Solemn Lament Yi Sang Exclusive Effect]

Maximum cap +10 for the sum of The Living & The Departed Potency and Count

After ing, heal 10 SP and 1 Base Attack Skill of the lowest rank in all of this unit's Skill Slots (except "Goodbye Now, a Sorrow in You") (2 times per turn)

Turn End: If this unit had a Defense Skill equipped this turn, heal 10 SP

Turn End: When Staggered, recover from Stagger, then (once per Encounter; excluding forced Staggers)

SYNERGYTeams and Synergies

Team Builds That Suit This E.G.OSinking Team

KEYWORDSEffect Glossary

Fragile
Take more damage from skills based on the effect’s Count for one turn. (Max 10)
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.
Gloom Resist Down
Increase Gloom Resistance based on Stack. (0.1 per Stack)
Gloom Fragility
Take more damage from Gloom skills based on the effect’s Count for one turn. (Max 10)
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
Reload
Lose all currently owned Ammo, and reload it back to full
Unfocused Volley
- When this Skill flips Coins, each Coin flips against a random enemy among its targets · The first Coin always targets the main target · All 'On Hit' effects and all damage dealt by each Coin are inflicted only against the random target the Coin selected
Dejection
- Low Morale - In a clash, if any Coin lands tails, Clash Power -1 for the clash
Discard
- Delete Skills that fit the condition and are selectable during the Chaining Phase from the Dashboard. (Defensive & E.G.O Skills do not count. Does not delete the Skill from the upcoming Skills list) - Discarded Skills will not activate Skill effects or Coin effects other than effects from Discard, and will not give E.G.O resources.
Butterfly
- Unique Sinking - Base Value: 0, Max Value: 15 - The Potency and the Count of this effect are called "The Living" and "The Departed", respectively. - When hit, the attacker heals (The Living/4) SP. (min 1; rounded down) - When hit, and if this unit's SP is at less than 0, take (Sinking Potency/5) Gloom damage for every value of The Departed. (max Gloom damage 30; rounded down; deals half damage to targets that are Non-SP Units.) - Turn End: Reset The Departed of this effect to 0; then, gain Sinking equal to The Living and convert The Living into The Departed. - No external effects can raise the amount of Butterfly inflicted. "Inflict additional Sinking" effects inflict additional Sinking instead of additional Butterfly. - This effect expires when both The Living and The Departed reach 0.
The Living & The Departed
- Unique Ammo - The sum of Potency and Count maxes out at 20. - Consumed for certain Skills. - Whether The Living(Potency) or The Departed(Count) will be consumed for each shot is randomly determined - Some attacks cancel if this unit runs out of ammo.