SLAY THE SPIRE / BOSSES

Corrupt Heart

Optional final boss of Act IV, gated behind gathering three colored keys.

QUICK REFERENCESlay the Spire 1Reviewed 2026-10-28Reference / noindex
Original schematic Volpedia category artwork
OVERVIEW

What is Corrupt Heart?

Optional final boss of Act IV, gated behind gathering three colored keys.

This reference covers gameplay decisions in the original Slay the Spire. Character-specific options and relic synergy can change how useful an item is, so consider your current deck, health, upcoming enemy and available resources before applying a strategy.

PRACTICAL STRATEGY

When and how to use it

Plan for Beat of Death, incoming debuffs, multi-hits and damage scaling well before the fight.

COMMON MISTAKES

What to avoid

An infinite or small-card deck may fail without an answer to card-play damage and scaling.

CONTINUE ON VOLPEDIA

Related topics and walkthroughs

GUIDESAct IV and Corrupt Heart Strategy

A practical original guide to act iv and corrupt heart strategy, organized around actual Slay the Spire 1 decisions and the threats those decisions must solve.

PROGRESSIONCorrupt Heart Victory

Optional endgame objective for capable decks that collect the three keys.

TIPSBring answers to Beat of Death

The Heart punishes each card play, so cheap-card loops need defenses.

CARDSCorruption

Makes Skills free while exhausting them, creating explosive turns and a finite defensive resource.

BOSSESAwakened One

Act III boss whose scaling punishes careless Power plays and includes a second phase.

BOSSESBronze Automaton

Act II boss that summons minions and threatens an extremely powerful Hyper Beam.

BOSSESDonu and Deca

Act III paired boss where repeated buffs and attacks demand target priority.

Back to Bosses

Independent Volpedia editorial resource, not affiliated with Mega Crit. Original game (Slay the Spire 1), reviewed 2026-10-28. Slay the Spire 2 has separate rules, cards and characters and is not included here. Category graphics are original conceptual illustrations, not game screenshots or actual card artwork. Detailed numerical card costs, damage, upgrade effects and drop percentages are omitted where not individually checked. Editorial verification records are stored separately from public articles.