Sampo — Honkai Star Rail Character Guide

Overview

Consistent DoT dealer stacking Wind Shear up to 5 times and applying a teamwide DoT vulnerability debuff via Ultimate. Excellent Toughness damage and can run SP-positive, but requires eidolon investment to compete and ramps slowly.

Wind Nihility DoT dealer who stacks Wind Shear up to 5 times on enemies via Bounce Skill and AoE Ultimate. Wind Shear deals passive ATK-scaling DoT each turn at 52% ATK per stack (260% total at 5 stacks). Ultimate applies a teamwide 30% DoT vulnerability debuff for 2 turns, amplifying all DoTs multiplicatively. Can run SP-positive by alternating Basic and Skill, making him a flexible sub-DPS in DoT compositions.

Key Mechanics

• Wind Shear DoT cannot crit — CRIT Rate and CRIT DMG substats are completely wasted. Only ATK%, SPD, and Effect Hit Rate matter for damage scaling.
• Effect Hit Rate must reach 67%+ to guarantee Wind Shear application (65% base chance modified by EHR) and Ultimate DoT vulnerability debuff landing. Below this threshold, damage output drops significantly from missed applications.
• All attacks hit multiple times (Basic 1x, Skill 5x, Ultimate 4x per target), making Wind Shear stacking fast even with the 65% per-hit application chance. At E0, reaching 5 stacks typically takes 2-3 actions.
• The 30% DoT vulnerability from Ultimate is a separate multiplier that benefits ALL DoTs on enemies — teammates' Shock, Burn, Bleed, and Break DoTs all benefit. This makes Sampo a universal DoT amplifier, not just a personal damage dealer.
• Bounce targeting on Skill is random after the initial hit. In single-target scenarios, all 5 hits land on the same enemy (90 Toughness damage per Skill). In multi-target, bounces spread across enemies, applying Wind Shear widely but less concentrated per target.

Best Teams for Sampo

Kafka DoT Detonation

Core DoT composition pairing Sampo's Wind Shear maintenance with Kafka's detonation mechanic. Sampo builds 5 Wind Shear stacks and maintains them via the 4-turn duration from his A2 Trace. Each Kafka Skill and Ultimate detonates all active DoTs, effectively doubling Wind Shear damage output. Sampo's Ultimate applies 30% DoT vulnerability to all enemies, amplifying detonated Wind Shear, Shock, and any other DoTs multiplicatively. Ruan Mei's RES PEN and Break Extension extend vulnerability windows and improve DoT tick damage.

• A-tier: Sampo, Kafka, Ruan Mei, Huohuo
• A-tier: Sampo, Kafka, Jiaoqiu, Huohuo
• B-tier: Sampo, Black Swan, Ruan Mei, Huohuo

Multi-DoT Budget

Accessible DoT composition leveraging Sampo's 30% DoT vulnerability debuff with any combination of DoT characters. Works with free units like Serval, Guinaifen, and Asta. All DoTs on the field benefit multiplicatively from Sampo's Ultimate debuff. Sampo's AoE Bounce Skill and AoE Ultimate enable efficient stack application across multiple enemies, making this configuration strongest in Pure Fiction. Ramp time to 5 stacks is a weakness against single tough targets.

• C-tier: Sampo, Serval, Asta, Gallagher
• B-tier: Sampo, Guinaifen, Ruan Mei, Gallagher

Best Teammates

DPS Partners: Kafka (S+), Black Swan (A), Hysilens (A), Serval (B), Guinaifen (B), Luka (B), Acheron (C)

Amplifiers: Ruan Mei (S+), Jiaoqiu (S), Pela (B), Robin (B), Silver Wolf (B), Asta (C), Tingyun (C)

Sustains: Huohuo (S+), Gallagher (B), Aventurine (B), Fu Xuan (B), Lingsha (B), Hyacine (B), Luocha (C)

Investment Priority

1. E1 — Adds a 6th bounce to Skill, increasing total hits from 5 to 6. Improves Wind Shear application consistency, Toughness damage, and Energy gain. Highly recommended as the first investment target.
2. E4 — Each Skill hit against a 5-stack enemy detonates 8% of current Wind Shear DMG — at E1 that is 6 hits for 48% instant Wind Shear detonation per Skill. Significant damage spike when stacks are maintained.
3. E6 — Increases Wind Shear DMG multiplier by 15%, boosting per-stack multiplier from 52% to 67% ATK. At 5 stacks this is a substantial passive damage increase each turn.
4. LC S1 — Lies Dance on the Breeze provides 18% SPD and 24% DEF reduction to all enemies after each attack. Strongest LC for Sampo if accessible; otherwise Good Night and Sleep Well at S5 is the practical goal.

Best Relics

Recommended: prisoner-in-deep-confinement with revelry-by-the-sea

Stat targets: Effect Hit Rate 67%+, ATK 2600+, SPD 134+ (Kafka sync), ATK 3600+

Main stats: Body: Effect Hit Rate / ATK% · Feet: SPD · Sphere: Wind DMG / ATK% · Rope: ATK%

Important Notes

• Requires 67%+ Effect Hit Rate to guarantee Wind Shear application and DoT vulnerability debuff landing. Build EHR via relics and Main Stats before prioritizing ATK.
• Wind Shear ramp time (3-5 turns to reach 5 stacks reliably at E0) is a disadvantage in fast-clear formats. E1 greatly reduces this by adding a 6th Bounce hit.
• DoT archetype is outpaced by FUA and Super Break teams in current endgame. Sampo works best alongside Kafka or Black Swan; avoid building him for solo carry teams.
• Wind Shear DoT cannot crit — CRIT Rate and CRIT DMG substats have no value. Prioritize ATK%, SPD, and Effect Hit Rate in relic substats.