Kafka team
Lightning · Damage over timePlays DoT applierKafka detonates the stacks Black Swan and a third Nihility unit apply, so every slot but the sustain exists to keep a damage-over-time state on the enemy.

Garden of Recollection
Build guide · Honkai: Star Rail
English voice: Arryn Zech
The best Black Swan build in Honkai: Star Rail (Version 4.6) is Reforged Remembrance with Prisoner in Deep Confinement. Updated November 5, 2026
Also works
Also works
Reach your desired breakpoints of EHR first, then SPD, and finally, after that, stack as much ATK% as possible.
#1
Talent
Max first
#2
Ultimate = Skill = Basic
Then
Major traces, best first: Candleflame's Portent (A6) > Goblet's Dredges (A4) > Viscera's Disquiet (A2)
While Black Swan is active in combat, enemies afflicted with Wind Shear, Bleed, Burn, or Shock will have their corresponding Wind, Physical, Fire, or Lightning RES respectively reduced by 25%.
When enemy targets enter combat, there is a 100% base chance to inflict 30 stack(s) of "Arcana" on them.
While in the "Epiphany" state, enemy targets take 20% increased DMG. And at the start of every turn or when they get defeated, regenerates 8 Energy for Black Swan.
The upper limit of stackable "Arcana" increases by 30. When an enemy target gets attacked by Black Swan's teammates, Black Swan has a 65% base chance of inflicting 1 stack of "Arcana" on the target. For every 1 stack of "Arcana" Black Swan inflicts on an enemy target, additionally increases the number of "Arcana" stacked this time by 1.
Kafka detonates the stacks Black Swan and a third Nihility unit apply, so every slot but the sustain exists to keep a damage-over-time state on the enemy.
Honkai: Star Rail 5★ Wind Nihility Sub DPS
Reforged Remembrance tops the light cone ranking for Black Swan at S1, ahead of Those Many Springs, Eyes of the Prey and It's Showtime. That order is prydwen.gg's, measured in play and rephrased here; every row of it sits under Light cones below.
Run Prisoner in Deep Confinement on Black Swan, with Pioneer Diver of Dead Waters behind it. The planar ornament is Revelry by the Sea. Main stats are Effect HIT Rate body, ATK% feet, Wind DMG sphere, ATK% rope. Roll substats in the order EHR (Until 120%) > SPD (Until breakpoint) > ATK%.
Trace priority is Talent > Ultimate = Skill = Basic. The Ultimate costs 120 energy, which is what an Energy Regeneration Rate target has to clear.
Black Swan plays DoT applier in the Kafka team, alongside Kafka, Hysilens and Huohuo.