Should I upgrade Prolong in Slay the Spire 2?

Compare the upgraded text: Next turn, gain Block equal to your current Block.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.

What builds use Prolong?

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

What character uses Prolong?

Prolong 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.

Prolong

Colorless · Skill · Uncommon · 0 cost

Base

Upgraded

Card text

Next turn, gain Block equal to your current Block. Exhaust.

Prolong+

Next turn, gain Block equal to your current Block.

Keywords

Exhaust

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

Prolong FAQ

Should I upgrade Prolong in Slay the Spire 2?: Compare the upgraded text: Next turn, gain Block equal to your current Block.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
What builds use Prolong?: Prolong is tagged as a Colorless card. Colorless cards can be picked by any class.
What character uses Prolong?: Prolong 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.