Overview
Beidou's burst creates lightning discharges that proc when your active character attacks. Her skill counter-attack deals massive AoE Electro damage. She needs high ER (200%+) and a Fischl battery. Counter-attack at the moment of being hit for maximum damage.
How to Play
Use skill counter-attack when enemies are about to hit you, perfect counters deal full damage. Cast burst, then swap to your on-field DPS who attacks frequently to trigger discharges. Fischl's Oz is ideal for triggering discharges off-field.
Optimal Rotation
Fischl Skill, Beidou Skill (counter), Beidou Burst, swap to Xingqiu/Sucrose on-field attacks, Fischl Burst, repeat. Use Bennett or another battery if energy is tight. Counter-attack before burst for particle generation.
F2P Options
Prototype Archaic or Akuoumaru work well. Emblem set with ER sands is essential. Beidou is a 4★ from banners, C0 works but C2 is a significant upgrade if you get duplicates.
Common Mistakes
Bursting without enough ER causes long downtime. Using hold skill without getting hit wastes cooldown. Keeping Beidou on-field, lightning discharges need a fast-attacking on-field character. Running Beidou without Fischl battery in solo Electro teams.