Slay the Spire 2 Epochs Guide: How to Actually Progress
Progression in this game isn't a single XP bar anymore, it's a sprawling Timeline made of individual milestones called Epochs, and ignoring that system is why your card pool feels thin five hours in.
Every time a specific condition gets met, clearing a boss, playing a character for the first time, hitting a score threshold, an Epoch unlocks and permanently adds new cards, relics, potions, or mechanics to every future run. None of it is tied to grinding one character in isolation. If dying early and often is the current problem rather than progression itself, my beginner's survival guide is worth reading first, since none of the milestones below matter if a random slime keeps ending the run on floor two.
The Foundation Unlocks
A handful of Epochs sit outside the character-specific chains entirely, tied instead to overall score, encountering certain NPCs, or just clearing the game a set number of times.
Most of these fall into place naturally just from playing regularly. The character-specific chains below are where the bulk of the actual card pool lives, though, and those require deliberate targeting.
How the Character Chains Connect
Every character shares the same seven-milestone structure: a first run, clearing each of the three Acts, 15 Elite kills, 15 Boss kills, and clearing Ascension 1. What's easy to miss is that these chains are also how the roster itself unlocks. Playing the Ironclad opens the door to the Silent. Beating a run with the Silent unlocks the Regent. The Regent leads to the Necrobinder, and the Necrobinder leads to the Defect. Grinding one character in isolation doesn't just cap out that character's own rewards, it stalls the entire roster behind it.
The Ironclad
Fog Rolls In — Play a run with him. Unlocks the Silent.
The Ironclad — Beat Act 1. Unlocks Molten Fist, Dominate, Cruelty.
Devastation — Beat Act 2. Unlocks Red Skull, Paper Phrog, Ruined Helmet.
The Pact — Beat Act 3. Unlocks Blood potion, Ashwater, Soldier's Stew.
Ablaze — Kill 15 Elites. Unlocks Cinder, Drum of Battle, Pact's End.
Snuffed — Kill 15 Bosses. Unlocks Self-Forming Clay, Charon's Ashes, Demon Tongue.
My Face — Beat Ascension 1. Unlocks Blood Wall, Inferno, Tear Asunder.
Rushing these efficiently mostly comes down to picking a lane early, and my Ironclad build guide covers which of his four archetypes gets there fastest.
The Silent
Anomalous Planet — Play a run with her. Unlocks the Regent.
Bigger Prey — Beat Act 1. Unlocks Snakebite, Bubble Bubble, Accelerant.
Ill — Beat Act 2. Unlocks Tingsha, Tough Bandages, Paper Krane.
Trophies — Beat Act 3. Unlocks Poison Potion, Cunning Potion, Ghost in a Jar.
Nemesis — Kill 15 Bosses. Unlocks Snecko Skull, Twisted Funnel, Helical Dart.
Poisoner — Kill 15 Elites. Unlocks Reflex, Hand Trick, Master Planner.
Soup — Beat Ascension 1. Unlocks Hidden Daggers, Phantom Blades, Blade of Ink.
Given she's got zero built-in healing, most of the difficulty here is just surviving long enough to hit these thresholds at all. Worth a look at my Silent guide if Act 2 keeps ending runs early.
The Regent
Life and Death — Play a run with him. Unlocks the Necrobinder.
I Arrive — Beat Act 1. Unlocks Spoils of Battle, Furnace, Sword Sage.
We Need a Hero! — Beat Act 2. Unlocks Fencing Manual, Galactic Dust, Lunar Pastry.
Grand Strategy — Beat Act 3. Unlocks Star Potion, King's Courage, Cosmic Concoction.
Discontent — Kill 15 Bosses. Unlocks Regalite, Mini Regent, Orange Dough.
Friends — Kill 15 Elites. Unlocks BEGONE!, Supermassive, Arsenal.
Little King — Beat Ascension 1. Unlocks Patter, Lunar Blast, Heavenly Drill.
His resource economy trips up a lot of people who try to build both his archetypes at once. My Regent guide goes into why picking one matters before chasing these milestones.
The Necrobinder
Booting Up — Play a run with her. Unlocks the Defect.
The Twelve — Beat Act 1. Unlocks Scourge, Countdown, Oblivion.
Futility — Beat Act 2. Unlocks Bone Flute, Funerary Mask, Book Repair Knife.
Spireborn — Beat Act 3. Unlocks Potion of Doom, Bone Brew, Pot of Ghouls.
Annihilation — Kill 15 Bosses. Unlocks Ivory Tile, Big Hat, Bookmark.
The Giant — Kill 15 Elites. Unlocks Afterlife, Calcify, Sacrifice.
To Kill — Beat Ascension 1. Unlocks Sculpting Strike, Veilpiercer, Banshee's Cry.
66 HP doesn't leave much room for error while working through this list. If Osty keeps dying before these thresholds get hit, my Necrobinder guide breaks down her three archetypes in more depth.
The Defect
Tricked — Beat Act 1. Unlocks Loop, Null, Consuming Shadow.
Hello! Hello! — Beat Act 2. Unlocks Data Disk, Symbiotic Virus, Metronome.
Resolving Bugs — Beat Act 3. Unlocks Focus Potion, Potion of Capacity, Essence of Darkness.
Laser Beams — Kill 15 Bosses. Unlocks Gold-Plated Cables, Emotion Chip, Power Cell.
Confrontation — Kill 15 Elites. Unlocks Barrage, Smokestack, Flak Cannon.
Ooh Shiny! — Beat Ascension 1. Unlocks TURBO, Scavenge, Heelix Drill.
Being last in the unlock chain means the Defect's Epochs are usually the ones sitting furthest away for newer players. Her orb RNG can make the Act clears frustrating on their own, and my Defect guide covers both the Focus-based orb builds and the Claw deck as a fallback when the cards aren't cooperating.
The Score-Based Grab Bag
The remaining Epochs don't ask for anything specific beyond playing consistently and accumulating score over time. They just pop automatically as the total climbs:
Preon — Automation, Catastrophe, Entropy
Scribbles — Reptile Trinket, Unsettling Lamp, Intimidating Helmet
The Architect — Prep Time, Eternal Armor, Jackpot
Ancients — Book of Five Rings, Kusarigama, Ice Cream
Open — Beetle Juice, Mazaleth's Gift, Droplet of Precognition
Traitors — Prowess, Rend, Beat Down
Elsewhere–Slumber — Alchemize, Nostalgia, Scrawl
Consequences — Miniature Cannon, Tungsten Ron, White Star
Buy Something! — Splash, Anointed, Calamity
If any of this feels slow going, the fastest lever to pull is simple: stop skipping Elites. They hand out a disproportionate chunk of score on top of feeding directly into each character's own Elite-kill tracker, which means every Elite fought is quietly working toward two separate unlock chains at once.
