Heartstring Nocturne
W-Engine effectString & MelodyCRIT 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.*Stats shown are at Base level.
| R1 | R2 | R3 | R4 | R5 | |
|---|---|---|---|---|---|
| 弦の音をまとって会心ダメージ+ | 50 | 57.5 | 65 | 72.5 | 80% |
| 場時、『連携スキル』発動時および『終結スキル』発動時に、装備者が「心弦」を1重獲得する。「心弦」1重につき、装備者の『連携スキル』と『終結スキル』がターゲットの炎属性ダメージ耐性を | 12.5 | 14.5 | 16.5 | 18.5 | 20% |
Verbatim from official game data. Refinement ONLY increases the passive effect values above — it does NOT change Base ATK or the Advanced Stat, which scale with level instead.
How to read this W-Engine page
Every W-Engine has 5 Refinement ranks (R1→R5): refinement ONLY strengthens the passive effect — the numbers in the table above run from left (R1, unrefined) to right (R5, max refinement via 4 duplicates or Overclock materials); Base ATK and the Advanced Stat (CRIT Rate/CRIT DMG/ATK%/PEN Ratio/Anomaly Proficiency...) do NOT change with refinement, only with the engine's level. "Best Agents for this W-Engine" prioritizes agents whose real build actually recommends this engine; if that data isn't available yet, the page falls back to agents sharing the same specialty as a rough guide. "Alternatives of the same specialty" lists other W-Engines with the same role — useful when you don't own the engine shown on this page.
Understand the mechanics behind this
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