Should I upgrade Reaper Form in Slay the Spire 2?

Compare the upgraded text: Retain. Whenever Attacks deal damage, they also apply that much Doom.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.

What builds use Reaper Form?

Reaper Form appears in 1 tracked build: The Doom Clock (A-tier, flex pick).

What character uses Reaper Form?

Reaper Form is tagged as a Necrobinder card. See the Necrobinder build hub for archetypes that care about it.

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

Reaper Form

Necrobinder · Power · Rare · 3 cost

Base

Upgraded

Card text

Whenever Attacks deal damage, they also apply that much Doom.

Reaper Form+

Retain. Whenever Attacks deal damage, they also apply that much Doom.

Builds that use Reaper Form

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

AThe Doom ClockNecrobinder · Flex pick

Keywords

Retain Doom

Build context

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

Related cards

Reaper Form FAQ

Should I upgrade Reaper Form in Slay the Spire 2?: Compare the upgraded text: Retain. Whenever Attacks deal damage, they also apply that much Doom.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
What builds use Reaper Form?: Reaper Form appears in 1 tracked build: The Doom Clock (A-tier, flex pick).
What character uses Reaper Form?: Reaper Form is tagged as a Necrobinder card. See the Necrobinder 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.