Should I upgrade Beam Cell in Slay the Spire 2?

Compare the upgraded text: Deal 4 damage. Apply 2 Vulnerable.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.

What builds use Beam Cell?

Beam Cell appears in 1 tracked build: Claw Machine (A-tier, flex pick).

What character uses Beam Cell?

Beam Cell is tagged as a Defect card. See the Defect build hub for archetypes that care about it.

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

Beam Cell

Defect · Attack · Common · 0 cost

Base

Upgraded

Card text

Deal 3 damage. Apply 1 Vulnerable.

Beam Cell+

Deal 4 damage. Apply 2 Vulnerable.

Builds that use Beam Cell

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

AClaw MachineDefect · Flex pick

Keywords

Vulnerable

Build context

See the Defect build hub for archetypes that feature this card in real runs.

Related cards

Beam Cell FAQ

Should I upgrade Beam Cell in Slay the Spire 2?: Compare the upgraded text: Deal 4 damage. Apply 2 Vulnerable.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
What builds use Beam Cell?: Beam Cell appears in 1 tracked build: Claw Machine (A-tier, flex pick).
What character uses Beam Cell?: Beam Cell is tagged as a Defect card. See the Defect build hub for archetypes that care about it.

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.