Should I upgrade Ultimate Defend in Slay the Spire 2?

Compare the upgraded text: Gain 15 Block.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.

What builds use Ultimate Defend?

Ultimate Defend appears in 1 tracked build: Barricade Iron Bastion (A-tier, flex pick).

What character uses Ultimate Defend?

Ultimate Defend 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.

Ultimate Defend

Colorless · Skill · Uncommon · 1 cost

Base

Upgraded

Card text

Gain 11 Block.

Ultimate Defend+

Gain 15 Block.

Builds that use Ultimate Defend

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

ABarricade Iron BastionIronclad · Flex pick

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

Ultimate Defend FAQ

Should I upgrade Ultimate Defend in Slay the Spire 2?: Compare the upgraded text: Gain 15 Block.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
What builds use Ultimate Defend?: Ultimate Defend appears in 1 tracked build: Barricade Iron Bastion (A-tier, flex pick).
What character uses Ultimate Defend?: Ultimate Defend 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.