Slay the Spire Walkthrough — Start to Endgame

Slay the Spire essentially invented the deckbuilder roguelike genre and remains its best execution. Each run climbs a three-act spire, battling enemies with a card deck you build from scratch. The genius is in how relics (passive items) synergize with specific card combinations to create broken combos — Shuriken (gain Strength on 3 attacks played) with a deck full of zero-cost attacks creates infinite scaling. Four characters with completely distinct card pools and playstyles provide hundreds of hours of variety. The Ascension system (20 difficulty levels per character) ensures the game stays challenging for thousands of hours. Slay the Spire 2 is in development, but the original remains a masterpiece.

This walkthrough takes you from your first session to endgame content. Each phase has specific goals, priorities, and milestones. Follow this path to avoid common traps that stall most players.

Quick Progression Summary

Phase 1: Getting Started — Exordium

Act 1 with the weakest enemies but crucial build foundation. Elite fights here drop relics that define your run. The Act 1 boss (one of three: Slime Boss, Guardian, Hexaghost) tests your damage output. Prioritize fighting 2-3 elites in Act 1 for essential relic acquisition.

Level/Difficulty: Act 1 (floors 1-16) Key Rewards: 2-3 elite relics, core card picks, boss relic choice

What to Do in Exordium

1. Learn deck building. Your deck starts with basic Strikes (damage) and Defends (block). Spend your first session getting comfortable with this.
2. Pick Silent as your starting build. It's the most forgiving option.
3. Remove Strikes (not Defends) at every opportunity — Strikes deal 6 damage which is irrelevant by Act 2. Defends at least provide 5 block which is always useful. A smaller deck draws your power cards more often.
4. Acquire your first equipment upgrade — Wraith Form or whatever's available.
5. Clear all main content before moving on.

Phase 1 Checklist

• Understand deck building fundamentals
• Silent selected and functional
• Exordium main content cleared
• Ready for The City

Phase 2: Early Game — The City

Act 2 ramps difficulty with multi-enemy fights and powerful elites (Book of Stabbing, Gremlin Leader, Taskmaster). Enemy damage and HP increases significantly. Your deck needs to handle both single-target bosses and multi-enemy hallway fights.

Level/Difficulty: Act 2 (floors 17-33) Key Rewards: Advanced card rewards, shop cards, second boss relic

What to Do in The City

1. Work on relic synergies. Relics are passive items gained from elites, bosses, events, and shops. This system becomes critical from here on.
2. Farm for Wraith Form if you haven't already. It's the key upgrade for this phase.
3. Boss relics (chosen after each boss) are the most impactful decisions in a run. Energy relics (+1 max energy) are almost always correct. Snecko Eye (randomize costs, draw 2 extra cards) is the strongest boss relic for most decks.
4. Complete all objectives before pushing to The Beyond.
5. Consider whether Ironclad might suit your playstyle better than Silent.

Phase 2 Checklist

• relic synergies integrated into gameplay
• Wraith Form acquired
• The City fully cleared
• Ready for The Beyond

Phase 3: Mid Game — The Beyond

Act 3 features the hardest regular enemies and devastating elites (Giant Head, Nemesis, Reptomancer). Your deck should be fully online with a clear win condition by now. The Act 3 boss is the final challenge — Awakened One, Time Eater, and Donu/Deca each punish different strategies.

Level/Difficulty: Act 3 (floors 34-50) Key Rewards: Final power cards, third boss relic, access to Heart

What to Do in The Beyond

1. Master potion management. Potions provide one-time combat effects: damage, block, buffs, or debuffs on enemies. This unlocks a new layer of gameplay.
2. Start working toward Corruption. It's the best equipment and becomes accessible around now.
3. Take every elite fight in Act 1 that you can survive — the relics from elites in Act 1 define the trajectory of your entire run. Skip Act 1 elites only if your HP is dangerously low.
4. This area is the main skill check. If you can clear it, you're ready for late game.
5. Start investing in event choices for the tactical depth you'll need going forward.

Phase 3 Checklist

• potion management mastered
• Corruption acquired or in progress
• The Beyond fully cleared
• Ready for The Heart

Phase 4: Late Game — The Heart

The optional superboss accessible by collecting all three colored keys during the run. The Heart has 750 HP (A20: 800), deals multi-hit attacks scaling each turn, and punishes card spam with a 15-card-per-turn cap. Beating the Heart is the community's true victory condition.

Level/Difficulty: Floor 51 (superboss) Key Rewards: True victory, score bonus, achievement/unlock

What to Do in The Heart

1. Finalize your build. You should be running Ironclad or Silent with optimized gear.
2. Corruption should be your primary. If you don't have it yet, prioritize getting it.
3. Don't skip card rewards blindly. Evaluate every card against your current deck — sometimes a card looks bad in a vacuum but fills a critical gap (AoE, block, scaling).
4. ascension levels optimization starts here. Small improvements compound into massive advantages.
5. Farm this area for the resources needed to push into Unknown Events.

Phase 4 Checklist

• Build fully optimized
• Corruption upgraded to max
• The Heart fully cleared
• Ready for Unknown Events

Phase 5: Endgame — Unknown Events

Question mark nodes with narrative encounters. Notable events: Face Trader (swap face for relic), Golden Shrine (upgrade or gain gold), Dead Adventurer (chance for relic or damage). Learning which events appear in which act and their optimal choices is an advanced skill.

Level/Difficulty: All acts Key Rewards: Free card removals, bonus relics, max HP changes, unique upgrades

What to Do in Unknown Events

1. Unknown Events tests everything. Come prepared with your best build and gear.
2. Potions win elite fights. Use Strength Potions, Dexterity Potions, and Focus Potions during elites instead of hoarding them. You'll find more potions before the boss.
3. The endgame loop: run Unknown Events, optimize gear, push harder content.
4. Experiment with Modded Characters for a fresh take once you've mastered the standard builds.
5. This is where ascension levels mastery separates good players from great ones.

Phase 5 Checklist

• Endgame content on farm
• Best-in-slot gear acquired
• Unknown Events fully cleared
• Ready for challenge content

Common Progression Mistakes

• Adding every card offered — deck bloat is the most common beginner mistake. A 30-card deck draws its key cards half as often as a 15-card deck. Skip cards that don't fit your build.
• Hoarding potions 'for the boss' while dying to elites — use potions on elites. If you die on floor 23 with 3 potions unused, those potions were wasted.
• Always choosing damage cards over block cards — you need both offense and defense. A deck with no block can't survive Act 2 multi-fights or Act 3 bosses.
• Ignoring pathing on the map — plan your path through each act before moving. Route through elites early, campfires when you need them, and shops when you have gold.
• Not learning enemy movesets — many deaths come from not knowing that Gremlin Nob punishes Skills, Book of Stabbing multi-hits more each turn, or Time Eater heals after 12 card plays.

Key Tips for Smooth Progression

1. Remove Strikes (not Defends) at every opportunity — Strikes deal 6 damage which is irrelevant by Act 2. Defends at least provide 5 block which is always useful. A smaller deck draws your power cards more often.
2. Boss relics (chosen after each boss) are the most impactful decisions in a run. Energy relics (+1 max energy) are almost always correct. Snecko Eye (randomize costs, draw 2 extra cards) is the strongest boss relic for most decks.
3. Take every elite fight in Act 1 that you can survive — the relics from elites in Act 1 define the trajectory of your entire run. Skip Act 1 elites only if your HP is dangerously low.
4. Don't skip card rewards blindly. Evaluate every card against your current deck — sometimes a card looks bad in a vacuum but fills a critical gap (AoE, block, scaling).
5. Potions win elite fights. Use Strength Potions, Dexterity Potions, and Focus Potions during elites instead of hoarding them. You'll find more potions before the boss.

For detailed build optimization, see Slay the Spire builds. For quick wins, check tips & tricks.