The best Black Swan build in Honkai: Star Rail centres around buffing the fortune teller's DoT damage. This five-star character is laser-focused around dealing DoT—or damage-over-time—and supporting teams that also like to slowly chip away at enemies with wind shear, bleed, burn, or shock.
Black Swan stacks the Arcana effect on enemies, dealing wind damage to them each turn, but she has a chance to inflict additional stacks on enemies who already have DoT effects. The more Arcana she stacks, the stronger her damage, plus she gets additional effects through her talent, such as ignoring 20% DoT defense when damaging enemies.
