Flowing Nightglow
Flowing Nightglow is a 5★ Light Cone for the Path of Harmony in Honkai: Star Rail.
Strong Energy Regen plus a 48% ATK and 24% team-wide DMG buff after the Ultimate — versatile for any Harmony unit, and best on Robin.
Every time an ally attacks, the wearer gains 1 stack of Cantillation. Each stack of Cantillation increases the wearer's Energy Regeneration Rate by 3%, stacking up to 5 time(s). When the wearer uses their Ultimate, removes Cantillation and gains Cadenza. Cadenza increases the Wearer's ATK by 48% and increases all allies' DMG dealt by 24%, lasting for 1 turn(s).
Time flows through the mirror, metamorphosing the once inexperienced little girl into a seasoned songstress. She studies her reflection in the mirror. Time has altered all but her green eyes, which still remain as serene as a lake, as if recounting an unshakable faith. "You seem in high spirits today." "Yes... after all, there's a very important 'performance'." "Indeed. The Charmony Festival's rehearsal is about to start. Please head to the preparation room." ... She steps out from the dressing room, leaving behind the brilliant lights of the theater, fading into the distance. "My stage lies not here." She closes her eyes, letting the night swallow her silhouette. "From the past to the present, my song has always been for..." "For those who have lost hope."
How to read this Light Cone page
Every Light Cone has exactly one passive effect tied to the wielder's combat performance; that effect scales up as you Superimpose it from S1 to S5 — use the S1-S5 buttons above to see the exact numbers at each level instead of guessing or interpolating. A Light Cone only delivers its full value on a character who shares its Path; "Characters who use this cone" lists every character on that Path, while "Best users" is a narrower list pulled from real build consensus, not a guess.
Base stats (HP/ATK/DEF) are shown at Lv80 for every cone of the same rarity so they can be compared directly; a 5-star cone will always edge out 4-star and 3-star ones here — the real difference lives in the passive effect, not the flat stats. The "Alternative cones on the same Path" section suggests a few other options if you do not own the signature cone yet, or want to compare before spending ascension materials.
See the full list on the Light Cones page, or check terms in the HSR Glossary.