Heartstring Nocturne

Release Date
February 12, 2025
1 year, 6 months, 26 days ago
(During Version 1.5)

Stats

Base Stat
Base ATK
48-713

Advanced Stat
CRIT Rate
9.6%-24%

W-Engine Overclock

1
2
3
4
5

String & Melody
CRIT DMG increases by 50%. When the equipper enters the battlefield, or activates a Chain Attack or Ultimate, they gain 1 stack of Heartstring. Each stack of Heartstring allows the equipper's Chain Attack and Ultimate to ignore 12.5% of the target's Fire RES, stacking up to 2 times and lasting 30s. Repeated triggers reset the duration.

1 → 2

Cost ×4,000

String & Melody
CRIT DMG increases by 57.5%. When the equipper enters the battlefield, or activates a Chain Attack or Ultimate, they gain 1 stack of Heartstring. Each stack of Heartstring allows the equipper's Chain Attack and Ultimate to ignore 14.5% of the target's Fire RES, stacking up to 2 times and lasting 30s. Repeated triggers reset the duration.

2 → 3

Cost ×4,000

String & Melody
CRIT DMG increases by 65%. When the equipper enters the battlefield, or activates a Chain Attack or Ultimate, they gain 1 stack of Heartstring. Each stack of Heartstring allows the equipper's Chain Attack and Ultimate to ignore 16.5% of the target's Fire RES, stacking up to 2 times and lasting 30s. Repeated triggers reset the duration.

3 → 4

Cost ×4,000

String & Melody
CRIT DMG increases by 72.5%. When the equipper enters the battlefield, or activates a Chain Attack or Ultimate, they gain 1 stack of Heartstring. Each stack of Heartstring allows the equipper's Chain Attack and Ultimate to ignore 18.5% of the target's Fire RES, stacking up to 2 times and lasting 30s. Repeated triggers reset the duration.

4 → 5

Cost ×4,000

String & Melody
CRIT DMG increases by 80%. When the equipper enters the battlefield, or activates a Chain Attack or Ultimate, they gain 1 stack of Heartstring. Each stack of Heartstring allows the equipper's Chain Attack and Ultimate to ignore 20% of the target's Fire RES, stacking up to 2 times and lasting 30s. Repeated triggers reset the duration.

MAX

Effects

The sound of the strings, sharp as blades, cut through the night, protecting the one.

Heartstring Nocturne is an -Rank W-Engine for Attack Agents. It is Evelyn Chevalier's Exclusive W-Engine.

Modifications and Stats

Toggle Modification Materials

Modification Level	Level	Main Stat (Base ATK)	Sub Stat (CRIT Rate)	Modification Costs
0	0/10	48	9.6%	(0 → 1) Denny 12,000 Attack Component 4
0	10/10	123	9.6%	(0 → 1) Denny 12,000 Attack Component 4
1	10/20	166	12.5%	(1 → 2) Denny 28,000 Reinforced Attack Component 12
1	20/20	241	12.5%	(1 → 2) Denny 28,000 Reinforced Attack Component 12
2	20/30	284	15.4%	(2 → 3) Denny 60,000 Reinforced Attack Component 20
2	30/30	359	15.4%	(2 → 3) Denny 60,000 Reinforced Attack Component 20
3	30/40	402	18.2%	(3 → 4) Denny 100,000 Specialized Attack Component 10
3	40/40	477	18.2%	(3 → 4) Denny 100,000 Specialized Attack Component 10
4	40/50	520	21.1%	(4 → 5) Denny 200,000 Specialized Attack Component 20
4	50/50	595	21.1%	(4 → 5) Denny 200,000 Specialized Attack Component 20
5	50/60	638	24.0%	—
5	60/60	713	24.0%	—

Total Modification Cost (1 → 5)

Denny

400,000

Attack Component

4

Reinforced Attack Component

32

Specialized Attack Component

30

Description

The soft hum of hidden strings and faint light blooming in the deep night, where sharpness and calm intertwine, transforming into a silent melody. Thread by thread, it captures everything held dear within.

"This? It's just a device for storing instrument strings."
—Evelyn, gently strumming the strings. A low hum fills the air, and as the final note echoes, the enemy falls silent.

Availability

Heartstring Nocturne is only available from Exclusive Channels Signal Search: Dissonant Sonata and Signal Search: Dazzling Melody.

Featured

Heartstring Nocturne has been promoted or featured with a drop-rate boost in 2 Signal Searches:

Signal Search	Featured	Date Start	Date End	Version
Dazzling Melody Sep 24, 2025 — Oct 14, 2025 Version 2.2	Heartstring Nocturne Kaboom the Cannon Drill Rig - Red Axis	September 24, 2025	October 14, 2025	2.2
Dissonant Sonata Feb 12, 2025 — Mar 11, 2025 Version 1.5	Heartstring Nocturne Drill Rig - Red Axis The Vault	February 12, 2025	March 11, 2025	1.5

W-Engine Showcase

Gallery

Trivia

The text written on the back of the W-Engine reads "LE CHEVALIER DE VERT HAUTDESERT", when translated from French to English, it reads "The Green Knight of Hautdesert"
- This is in reference to the poem Sir Gawain and the Green Knight, in which the Green Knight is Sir Bertilak de Hautdesert, the husband of Lady Hausdesert (a name given by modern critics).
  - Green Knight would likely reference Evelyn's former Fugue Codename, Scheele's Green, as well as reference her surname Chevalier literally translating to Knight.

Other Languages

Language	Official Name
English	Heartstring Nocturne
Chinese (Simplified)	心弦夜响 Xīnxián Yèxiǎng
Chinese (Traditional)	心弦夜響 Xīnxián Yèxiǎng
Japanese	心弦のノクターン Shinken no Nokutān
Korean	심금을 울리는 야상곡야상곡夜想曲 Simgeumeul Ullineun Yasanggok
Spanish	Acordes del corazón nocturno
French	Appassionato nocturne
Russian	Струны ночи Struny nochi
Thai	Heartstring Nocturne
Vietnamese	Tiếng Lòng Trong Đêm
German	Rührende Nachtmelodie
Indonesian	Heartstring Nocturne
Portuguese	Soar do Coração Noturno

Change History

Released in Version 1.5 - Astra-nomical Moment

[Edit History]

Version 1.6

The Animation was updated.

Version 1.5

Heartstring Nocturne was released.

Heartstring Nocturne

Modifications and Stats

Description

Availability

Featured

W-Engine Showcase

Gallery

Trivia

Other Languages

Change History

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