
Buffer
Power
2
Prevent the next time you would lose HP.

Buffer+
Power
2
Prevent the next 2 times you would lose HP.
Buffer
DefectPowerRare
Prevent the next time you would lose HP.
Prevent the next 2 times you would lose HP.
A 2-cost Power with a counter: the next time you would lose HP from any source, the loss becomes 0 and the counter drops by 1. Upgraded it starts at 2.- Checked after Block: a hit that Block fully absorbs does not spend a charge, but a 1-damage hit that gets through does.
- Self-inflicted losses and end-of-turn Burn damage count too.
- Charges from repeated casts add up.
When to take Buffer
Take it for a boss whose single big hits you cannot fully block, or for Act 3 in general. Upgrade it before playing it if you can, since that doubles its value.
Cards that synergize with Buffer

Echo Form
Power
3
Ethereal.
The first card you play each turn is played an extra time.
The first card you play each turn is played an extra time.
Echo FormEcho Form plays it twice for two charges.Ethereal.
The first card you play each turn is played an extra time.
The first card you play each turn is played an extra time.

Signal Boost
Skill
1
The next Power you play is played an additional time.
Exhaust.
Exhaust.
Signal BoostSignal Boost does the same once.The next Power you play is played an additional time.
Exhaust.
Exhaust.

Storm
Power
1
Whenever you play a Power, Channel 1 Lightning.
StormStorm triggers on Powers played, and Buffer is oneWhenever you play a Power, Channel 1 Lightning.

Subroutine
Power
1
Whenever you play a Power, gain .
SubroutineSubroutine triggers on Powers played, and Buffer is oneWhenever you play a Power, gain .

Synthesis
Attack
2
Deal 14 damage.
The next Power you play costs 0 .
The next Power you play costs 0 .
SynthesisSynthesis triggers on Powers played, and Buffer is oneDeal 14 damage.
The next Power you play costs 0 .
The next Power you play costs 0 .
Relics that synergize with Buffer
Frozen EggFrozen EggFrozen Egg upgrades it on pickup.Whenever you add a Power into your Deck, Upgrade it.
PermafrostPermafrostPermafrost gives 7 Block for the first Power you play.The first time you play a Power each combat, gain 7 Block.
Mummified HandMummified HandMummified Hand makes a random card free when you play it.Whenever you play a Power, a random card in your Hand is free to play that turn.
Game PieceGame PieceGame Piece draws a card.Whenever you play a Power, draw 1 card.
Lost WispLost WispLost Wisp triggers on Powers played, and Buffer is oneWhenever you play a Power, deal 8 damage to ALL enemies.
Intimidating HelmetIntimidating HelmetIntimidating Helmet triggers on cards that cost 2 or more, and Buffer is oneWhenever you play a card that costs or more, gain 4 Block.
Changes by version
- 12 Mar 2026Bug fixFixed an issue with Buffer+ card's description when playing in Portuguese
- Updated wording
Internal playtest notes are from before the Early Access release. Names and numbers in them can differ from the game today.

Purchase today

If you haven't bought Slay The Spire 2 yet, it's time. Support the devs, they made an amazing game.










