Slay the Spire 2 Wiki

Card

Beam Cell

Deal 3 damage. Apply 1 Vulnerable.

Beam Cell is a common Defect attack costing 0 Energy that deals 3 damage and applies 1 Vulnerable. As a free card, it provides efficient utility by making enemies take 50% more damage from all subsequent attacks that turn. The 0-cost nature of Beam Cell makes it easy to slot into any turn without disrupting your Energy plans.

Beam Cell works excellently with All for One, which retrieves it from the discard pile for repeated Vulnerable application. FTL and Claw join it in the 0-cost attack suite that All for One enables. Scrape draws cards and keeps 0-cost draws, making Beam Cell a natural companion for the archetype.

For the Defect, Beam Cell is a versatile common that fits into most decks. The Vulnerable debuff amplifies big attacks like Hyperbeam, Sunder, and Meteor Strike. Against bosses like Vantom and Doormaker, applying Vulnerable before your main damage cards significantly accelerates the kill. Pick Beam Cell when you need a free damage multiplier, especially in decks that already feature heavy-hitting attacks.

Details

Card TypeAttack
Cost0
RarityCommon
TargetSingle-Enemy
Effect TextDeal 3 Damage. Apply 1 Vulnerable.

Character

NoindexYes
In GameConfirmed

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Quick Facts

Type
Card
Confidence
High
Verified
Mar 12, 2026