Beginner's Guide
Introduction
Slay the Spire is a deck-building roguelike. You clear three Acts while picking from randomly offered cards and Relics, and every run plays out differently, demanding sharp situational judgment.
This guide covers all four characters, core mechanics, deck-building principles, and map routing. Start with the Ironclad for your first 5–10 runs to get the full-run rhythm into muscle memory before worrying about optimization.
Character Overviews
| Character | One-liner | Difficulty |
|---|---|---|
| Ironclad | 80 HP melee warrior who scales Strength and heals after every combat | Beginner |
| Silent | Tactical class built around Poison and Shivs; lower HP but rich in disruption | Intermediate |
| Defect | Orb-channeling caster that scales through Focus management | Intermediate |
| Watcher | Stance-switching for explosive damage; highest ceiling, highest risk | Advanced |
Ironclad (Start Here)
80 HP and Burning Blood (heal 6 HP at combat end) make the Ironclad the most forgiving character. His HP buffer absorbs the mistakes that end other characters' runs. Stick with him until the full-run flow — Elites, Relics, Campfire decisions, Boss patterns — becomes second nature.
Core build directions:
- Strength scaling: Demon Form (+2 Strength per turn) + Heavy Blade (applies Strength 3×) is the classic high-damage engine. Spot all Strength-gain cards and snowball from there
- Exhaust build: Corruption (all Skills cost 0, exhaust) + Dead Branch (random card from each exhausted card) is one of the most powerful combos in the game. Every Skill becomes free and self-replacing
- Block build: Impervious and high-value Skills for consistent Block generation with solid HP retention
Silent
70 HP but compensates with a large toolkit of disruption, card draw, and cheap attacks.
Core build directions:
- Poison build: Layer Poison with Noxious Fumes, Bouncing Flask, and Corpse Explosion. Poison scales multiplicatively in long fights — the Silent wins by outlasting
- Shiv build: Accuracy (+4 damage per Shiv) and Shuriken (+1 Strength per 3 Shivs played) with Blade Dance and Cloak and Dagger. A well-built Shiv deck outputs high DPS on zero-cost cards
- Combo/draw build: Adrenaline and Acrobatics to cycle through the deck quickly and set up specific card combinations
Defect
Channels Orbs (Lightning, Frost, Dark, Plasma) that act passively every turn and trigger a stronger Evoke effect when removed. Every point of Focus amplifies every Orb simultaneously.
Orb reference:
| Orb | Evoke Effect | Passive Effect |
|---|---|---|
| Lightning | 8 (+2×Focus) damage | 3 (+Focus) damage to one enemy |
| Frost | Block based on stacked Orbs | 2 (+Focus) Block per turn |
| Dark | Deals all accumulated damage at once | Stacks damage each turn |
| Plasma | Recover 2 Energy | +1 Energy per turn |
Core build directions:
- Frost build: Stack Focus and fill Orb slots with Frost Orbs for automatic Block every turn. Cold Snap and Glacier are the key cards; this build handles most boss fights passively
- Lightning build: Fill slots with Lightning Orbs, use Storm (Evoke a Lightning Orb on every Attack) for chain triggers. Electrodynamics hits all enemies
- Dark build: Stack one Dark Orb to massive damage, then Evoke or force it to fire with Creative AI or the Claw combo for multi-Orb explosion turns
Watcher
The highest-damage character in the game, but mismanaging Stance spikes incoming damage at the worst possible moment.
Stance reference:
| Stance | Effect | On Exit |
|---|---|---|
| Calm | Neutral | Gain 2 Energy when leaving |
| Wrath | Deal/take 2× damage | — |
| Divinity | Deal 3× damage, take 0, gain 3 Energy | Returns to Calm after 3 turns |
Core build directions:
- Stance-cycle build: Calm → Wrath → Calm loop. Each Calm exit recovers 2 Energy. Reach the Infinite (Rushdown + Equilibrium + Tantrum or similar) and cycle the entire deck every turn for unlimited Energy and damage
- Divinity build: Collect enough Stance-entry cards to reliably hit Divinity and dump all damage in one turn. Requires specific card combinations but is nearly unstoppable when assembled
Core Systems
Energy and Card Cost
- 3 Energy at the start of each turn (modified by Relics and cards)
- X-cost cards consume all remaining Energy
- Unspent Energy is lost at the end of your turn (exception: Runic Pyramid)
- 0-cost cards are nearly always stronger than their 1-cost counterparts — they let you play another card in the same turn, compounding every other combo you run
Block and Damage
- Block prevents damage 1:1 and resets at the start of your next turn (Barricade and similar are exceptions)
- Read the enemy intent icon every single turn. A missed big-damage warning is often lethal
- Vulnerable increases damage taken by 50%. Weak reduces damage dealt by 25%
Key Buffs and Debuffs
| Effect | What It Does |
|---|---|
| Strength | +N to attack card damage |
| Dexterity | +N to skill card Block |
| Vulnerable | Takes 1.5× damage |
| Weak | Deals 0.75× damage |
| Poison | Takes N damage at turn start, stack −1 per tick |
Deck Building Principles
Keep the Deck Thin
Target 10–20 cards for most of the run.
- Your starter deck is full of Strikes and Defends. Removing them is the single highest-impact move in the early game
- Because STS reshuffles the discard when the draw pile empties, a thinner deck loops your key cards more often per fight
- Skipping a card reward is always a valid choice — every mediocre card dilutes your best ones
- Card removal at the Shop is the highest-priority gold spend (~75–100 Gold per removal)
The Three Questions
Before taking any card:
- Does this card fill a gap in my current deck?
- Does this card support my primary build direction?
- Would skipping this make my deck weaker?
Three No's = skip without hesitation.
Act-by-Act Card Pick Philosophy
Act 1: Do not force a specific build. Take cards that function immediately. AoE is mandatory for multi-enemy fights — Act 1 is heavy on grouped encounters. Avoid Powers that do nothing until later turns; fights are too short to wait for setup.
Act 2: Commit to one clear direction. Powers come online here because fights run longer. Aggressively remove cards that no longer fit. Goal: key combo assembled, deck as lean as possible by Act 2 end.
Act 3: Deck compression is the top priority. Build around the final boss. Adding new cards in Act 3 is almost always wrong unless it fills a critical gap.
Relic Strategy
Relics are permanent passive effects that last the entire run.
Relic Sources
| Type | How to Get | Power Level |
|---|---|---|
| Boss Relic | 1 of 3 choices after Boss kill | Strongest; often has a downside |
| Elite Relic | 1 guaranteed drop per Elite kill | Strong mid-tier |
| Shop Relic | Purchase from Merchant | Expensive (150–300 Gold) but run-defining |
| Common Relic | Chests, events | Versatile utility |
Elites are worth fighting aggressively primarily because of the guaranteed Relic drop. Two or three Elite Relics in Act 1 can completely define the run's trajectory.
When choosing a Boss Relic, match it to your current build, not to raw power in isolation.
Gold priority order: Relic > Card removal > Card addition > Potions
Map Navigation
Node Types
| Icon | Node | Notes |
|---|---|---|
| Sword | Combat | Standard fight |
| Flame | Elite | Hard fight; guaranteed Relic on win |
| Campfire | Rest Site | Heal 30% HP or upgrade one card |
| $ | Shop | Buy cards, Relics, Potions; pay to remove a card |
| ? | Event | Variable risk and reward |
| Boss skull | Boss | End-of-Act final fight |
Routing Principles
- Scroll to the top of the map immediately. Know the boss before you plan a route
- Work backward from the boss: find Elites, Rest Sites, and Shops, then trace a path that hits what you need
- Plan 3–4 nodes ahead — committing to a node without checking what follows wastes routing opportunities
- Prioritize routes where a Rest Site appears within 1–2 nodes of an Elite
- HP does not reset between Acts. Budget HP across Act boundaries
HP-Based Routing
| HP State | Recommended Route |
|---|---|
| 80%+ | Fight Elites; secure a Campfire afterward |
| 60–79% | Elite only if Campfire is nearby; otherwise normal combat |
| 40–59% | Campfire first |
| Below 40% | Campfire mandatory; avoid Elites |
Campfire Decisions
- Above 60% HP: upgrade, not heal
- Below 50% HP or facing a punishing next fight: heal
- Prioritize cards that drop in cost — a key card going from 2-cost to 1-cost enables one extra card per turn for the rest of the run
- Do not spend upgrades on starter cards (Strike, Defend); upgrade your drafted key cards first
Elite Fight Thresholds
| Act | Fight if Above |
|---|---|
| Act 1 | 60% HP |
| Act 2 | 50% HP |
| Act 3 | 40% HP (deck complete only) |
Community rule of thumb for Act 1: if your deck can output ~130 damage in 3 turns, it is ready for an Elite.
Potion Usage
- Use Potions during Elite fights to reduce total HP lost entering the next node — do not hoard them for a Boss that may not need them
- Free a slot when full rather than letting a new drop go to waste
- Dying with potions in your pocket is the worst possible outcome. If a Potion would prevent a lethal hit, use it immediately
Common Beginner Mistakes
Deck Management
- Too many cards: A 20-card deck is dramatically more consistent than a 40-card pile, even with weaker individual cards
- Splitting the build: Two half-built concepts is always worse than one complete one; commit to a direction by early Act 2
- Skipping card removal: Removing a starting Strike or Defend from the Merchant is often the best 75–100 Gold you spend all run
Strategic Mistakes
- Ignoring intents: Missing a big-damage warning leads to preventable deaths — read them every turn
- Avoiding every Elite: Falling behind on Relics makes Act 3 and the final boss significantly harder
- Always healing at Campfires: Healing every time instead of upgrading is a long-term deficit
- Forgetting HP carries between Acts: "New Act = full HP" is false
Recommended Learning Path
- Ironclad for the first 5–10 runs — forgiving and straightforward. Learn the full run flow before optimizing
- Target a clear on the lowest difficulty first — get the Act 1 → 2 → 3 rhythm into muscle memory
- Analyze losses honestly — where did you lose HP and why? Bad Relic choice? Poor map routing? Deck imbalance?
- Progress to Silent, then Defect, then Watcher — each adds a new layer of complexity after the previous one feels comfortable
- Raise Ascension gradually — only after each character feels stable at the current level
This article covers the original Slay the Spire (STS1).