Should I upgrade Fuel in Slay the Spire 2?

Compare the upgraded text: Gain 1 Energy. Draw 2 cards. Exhaust.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.

What builds use Fuel?

Fuel appears in 1 tracked build: Claw Machine (A-tier, core card).

What character uses Fuel?

Fuel 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.

Fuel

Colorless · Skill · Token · 0 cost

Base

Upgraded

Card text

Gain 1 Energy. Draw 1 card. Exhaust.

Fuel+

Gain 1 Energy. Draw 2 cards. Exhaust.

Builds that use Fuel

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

AClaw MachineDefect · Core card

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

Fuel FAQ

Should I upgrade Fuel in Slay the Spire 2?: Compare the upgraded text: Gain 1 Energy. Draw 2 cards. Exhaust.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
What builds use Fuel?: Fuel appears in 1 tracked build: Claw Machine (A-tier, core card).
What character uses Fuel?: Fuel 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.