Should I upgrade Flash of Steel in Slay the Spire 2?

Compare the upgraded text: Deal 8 damage. Draw 1 card.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.

What builds use Flash of Steel?

Flash of Steel appears in 1 tracked build: Claw Machine (A-tier, core card).

What character uses Flash of Steel?

Flash of Steel is tagged as a Colorless card. Colorless cards can be picked by any class.

Updated for Data 2026-03-17Early Access — numbers may shift with patches.

Flash of Steel

Colorless · Attack · Uncommon · 0 cost

Base

Upgraded

Card text

Deal 5 damage. Draw 1 card.

Flash of Steel+

Deal 8 damage. Draw 1 card.

Builds that use Flash of Steel

Archetypes that draft this card in real runs, with the role it plays.

AClaw MachineDefect · Core card

Build context

Colorless cards splash into every class. Browse the Colorless card pool and pair it with any class build hub for archetypes that want it.

Related cards

Flash of Steel FAQ

Should I upgrade Flash of Steel in Slay the Spire 2?: Compare the upgraded text: Deal 8 damage. Draw 1 card.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
What builds use Flash of Steel?: Flash of Steel appears in 1 tracked build: Claw Machine (A-tier, core card).
What character uses Flash of Steel?: Flash of Steel is tagged as a Colorless card. Colorless cards can be picked by any class.

Patch history

SpireForge snapshots card text from Untapped exports dated 2026-03-17. When Mega Crit ships a balance patch, we re-run the scraper and refresh every affected URL—see /patches for the editorial log.