Honkai: Star Rail · UPGRADE MATERIAL

Thunder Strum

Used in supported upgrade goals for 2 records. Open a record to choose a target and calculate the exact requirement.

About Thunder Strum

Material

Where to obtain it

Stagnant Shadow: Dovebrook District
Omni-Synthesizer — Material Exchange

Used by the supported upgrade goals listed below. Requirements depend on the selected current and target levels.

Owned Thunder Strum

WHERE IT FITS

Characters and equipment that use this material

Thunder★★★★★

Ashveil

Released Mar 25, 2026Lightning Hunt character who applies Bait, reduces enemy DEF, and launches Charge-funded follow-up attacks.Guide

Ashveil applies Bait to a selected enemy; while Bait is present, all enemies’ DEF is reduced. When another ally attacks Bait, Ashveil can spend Charge for a follow-up that adds Gluttony. His Ultimate applies Bait and launches an enhanced follow-up, with a Gluttony-based extra hit and a kill chain under stated conditions.

Thunder★★★★★

Gilgamesh

Released Jul 24, 2026Lightning Destruction attackerGuide

Gilgamesh deals Lightning damage to single targets and groups. His mechanics reward ally actions and Ultimate use; with Saber, attacks also build toward a joint follow-up. These abilities describe his damage pattern, but do not establish comparative performance.