Should I upgrade Arsenal in Slay the Spire 2?

Compare the upgraded text: Whenever you play a Colorless card, gain 2 Strength.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.

What builds use Arsenal?

Arsenal appears in 2 tracked builds: Borrowed Arsenal (A-tier, hero card), Iron Crown (B-tier, core card).

What character uses Arsenal?

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

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

Arsenal

Regent · Power · Rare · 1 cost

Base

Upgraded

Card text

Whenever you play a Colorless card, gain 1 Strength.

Arsenal+

Whenever you play a Colorless card, gain 2 Strength.

Builds that use Arsenal

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

Keywords

Strength

Build context

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

Related cards

Arsenal FAQ

Should I upgrade Arsenal in Slay the Spire 2?: Compare the upgraded text: Whenever you play a Colorless card, gain 2 Strength.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
What builds use Arsenal?: Arsenal appears in 2 tracked builds: Borrowed Arsenal (A-tier, hero card), Iron Crown (B-tier, core card).
What character uses Arsenal?: Arsenal is tagged as a Regent card. See the Regent 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.