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Buffer — Defect Power Card in Slay the Spire 2

Updated 17 Oct 2026 Source Slay the Spire 2 card data (spire-codex.com API), 577 cards retrieved 17 October 2026 By
Data status: The facts on this page were checked against the source named above. Game values can still shift with a patch, so re-check anything that looks off.
Buffer card art
Buffer

Prevent the next time you would lose HP.

CharacterDefect
TypePower
RarityRare
Cost2 Energy
TargetSelf

Card text

Prevent the next time you would lose HP.

Upgraded: Prevent the next 2 times you would lose HP.

What it applies

  • Buffer × 1

Other Defect cards at 2 Energy

  • Adaptive Strike — Deal 18 damage. Add a 01 Energy copy of this card into your Discard Pile.
  • All for One — Deal 10 damage. Put ALL 01 Energy cards from your Discard Pile into your Hand.
  • Bulk Up — Lose 1 Orb Slot. Gain 2 Strength. Gain 2 Dexterity.
  • Consuming Shadow — Channel 2 Dark. At the end of your turn, Evoke your leftmost Orb.
  • Feral — The first time you play a 01 Energy Attack each turn, return it to your Hand.
  • Flak Cannon — Exhaust ALL your Status cards. Deal 8 damage to a random enemy for each card Exhausted.

Where to go next

All 577 cards — the full table, filterable by character. Efficiency tier list — every measurable card ranked.

Rarity system explains how often this card appears. Enchantments covers the modifiers that can change it.

Frequently asked questions

What does Buffer do in Slay the Spire 2?

Prevent the next time you would lose HP.

What does upgrading Buffer change?

Prevent the next 2 times you would lose HP.

How much does Buffer cost?

2 Energy. It is a Rare Power card.

More Slay the Spire 2 guides

Sources

Figures and item data on this site are read from the game’s own reference wiki before publishing. Where a value could not be confirmed there, the page says so instead of filling the gap.