Should I upgrade Resonance in Slay the Spire 2?

Compare the upgraded text: Gain 2 Strength. ALL enemies lose 1 Strength.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.

What builds use Resonance?

Resonance appears in 1 tracked build: Iron Crown (B-tier, hero card).

What character uses Resonance?

Resonance 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.

Resonance

Regent · Skill · Uncommon · 1 cost

Base

Upgraded

Card text

Gain 1 Strength. ALL enemies lose 1 Strength.

Resonance+

Gain 2 Strength. ALL enemies lose 1 Strength.

Builds that use Resonance

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

BIron CrownRegent · Hero card

Keywords

Strength

Build context

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

Related cards

Resonance FAQ

Should I upgrade Resonance in Slay the Spire 2?: Compare the upgraded text: Gain 2 Strength. ALL enemies lose 1 Strength.. If the upgrade lowers cost, adds damage/block, or enables a combo piece, it is usually high priority.
What builds use Resonance?: Resonance appears in 1 tracked build: Iron Crown (B-tier, hero card).
What character uses Resonance?: Resonance 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.