Should I upgrade Colossus in Slay the Spire 2?

Compare the upgraded text: Gain 8 Block. You receive 50% less damage from Vulnerable enemies this turn.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.

What builds use Colossus?

Colossus appears in 1 tracked build: Cruel Hand of Reckoning (B-tier, flex pick).

What character uses Colossus?

Colossus is tagged as a Ironclad card. See the Ironclad build hub for archetypes that care about it.

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

Colossus

Ironclad · Skill · Rare · 1 cost

Base

Upgraded

Card text

Gain 5 Block. You receive 50% less damage from Vulnerable enemies this turn.

Colossus+

Gain 8 Block. You receive 50% less damage from Vulnerable enemies this turn.

Builds that use Colossus

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

BCruel Hand of ReckoningIronclad · Flex pick

Keywords

Vulnerable

Build context

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

Related cards

Colossus FAQ

Should I upgrade Colossus in Slay the Spire 2?: Compare the upgraded text: Gain 8 Block. You receive 50% less damage from Vulnerable enemies this turn.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
What builds use Colossus?: Colossus appears in 1 tracked build: Cruel Hand of Reckoning (B-tier, flex pick).
What character uses Colossus?: Colossus is tagged as a Ironclad card. See the Ironclad 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.