Should I upgrade Decay in Slay the Spire 2?

Compare the upgraded text: Unplayable. At the end of your turn, if this is in your Hand, take 2 damage.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.

What builds use Decay?

Decay is tagged as a Colorless card. Colorless cards can be picked by any class.

What character uses Decay?

Decay 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.

Decay

Colorless · Curse · Curse · 0 cost

Base

Upgraded

Card text

Unplayable. At the end of your turn, if this is in your Hand, take 2 damage.

Decay

Unplayable. At the end of your turn, if this is in your Hand, take 2 damage.

Keywords

Unplayable

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

Decay FAQ

Should I upgrade Decay in Slay the Spire 2?: Compare the upgraded text: Unplayable. At the end of your turn, if this is in your Hand, take 2 damage.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
What builds use Decay?: Decay is tagged as a Colorless card. Colorless cards can be picked by any class.
What character uses Decay?: Decay 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.