Beating Slay the Spire 2 once is the tutorial. Ascension is the actual game: a ladder of stacking modifiers that starts the moment your first run ends with a dead Act 3 boss. The catch is that the early levels do not work the way most players assume — the first few levels barely touch enemy numbers at all. They go after your elites, your healing, your gold, your potion slots and your deck. This guide walks through every Ascension level as it works right now in early access, points out the levels that genuinely change how you draft, and lays out a climb order that does not rely on grinding the same level for a week.
How Ascension unlocking works
You unlock Ascension 1 for a character by beating any Act 3 boss with that character. From there, each time you clear the Act 3 boss at your current level, the next level unlocks. One win, one level — there is no shortcut and no requirement to win "cleanly".
Progress is tracked separately for each character. Grinding Ascension on Ironclad does nothing for your Silent, which is worth knowing before you invest ten runs into one hero and then wonder why everything is locked on the others.
You are never forced to play your highest unlocked level. Any level you have unlocked can be picked when starting a run, so if Ascension 6 feels miserable, dropping back to 4 for a few runs is a perfectly reasonable way to rebuild confidence — and bank some wins while you adjust.
The game is in early access and the ladder has been reshuffled before — patches occasionally rename or rework levels. When that happens we cover it in the news section, and this guide gets updated with the current list.
Ascension 1–5: the modifiers that change how you play
Ascension 1 — Swarming Elites. Maps spawn roughly 60% more elite fights. This is the friendliest level on the ladder: more elites means more relics, more gold and more card rewards for everyone whose deck can handle the fights — skimming the relic list before an elite run helps you value those drops. If your elite pathing is good, A1 often feels easier than Ascension 0.
Ascension 2 — Weary Traveler. Ancients now heal only 80% of your missing HP, including Neow at the very start of the run. Healing becomes a partial patch instead of a full reset, so the campfire decision gets real: resting no longer tops you off, and routes that skip every campfire start to hurt by Act 2.
Ascension 3 — Poverty. Enemies and treasure chests drop 25% less gold. Shops were already a luxury; now they are a planning problem. The first card removal at a shop is still the best purchase in the game, so the fix is fewer impulse buys, not fewer visits — our map pathing guide covers routing around shops you can actually afford.
Ascension 4 — Tight Belt. You start every run with one fewer potion slot. Potions were the cheapest way to brute-force an elite or a boss, and now you have less room to hoard them. The habit to build is spending potions the moment they change a fight instead of saving a full belt for a disaster — the potion guide covers the timing.
Ascension 5 — Ascender's Bane. Every run starts with a curse in your deck. It is unplayable, Ethereal (it exhausts itself if it is still in your hand at the end of a turn), and Eternal, which means no shop, and no event, can ever remove it. In practice it is one dead draw per combat cycle — annoying rather than run-ruining, but it makes every point of card draw slightly more valuable.
Ascension 6–10: the late ladder
Ascension 6 — Inflation. Card removal at the Merchant starts at 100 gold instead of 75, and each additional removal climbs by 50 gold instead of 25. Removal is still correct; it is just no longer something you can do three times by accident. Pick one or two cards to delete per run and plan your gold around them.
Ascension 7 — Scarcity. Rare and upgraded cards appear half as often, in combat rewards and in shops alike. This is the level that most often breaks deck fantasies: the build that needs a specific rare to function stops coming together. The antidote is a deck built on strong commons and relics — our best common cards guide is exactly for this.
Ascension 8 — Tough Enemies. Everything gets more HP. Fights run longer, which favors decks with real scaling and punishes decks that win hallway fights slowly but never actually finish bosses. If your kills are stalling, this is why.
Ascension 9 — Deadly Enemies. Everything hits harder. The block floor of the game goes up across the board; a deck that blocked "enough" at A8 starts leaking. This is where defensive scaling — dexterity, plating, Barricade plans — stops being optional.
Ascension 10 — Double Boss. The Act 3 finale becomes two bosses, back to back, with no rest between them. Sustained output and a deep block plan matter more than any single explosive turn. Beating A10 is the current summit of singleplayer Slay the Spire 2.
The three real walls — and they are not the ones you expect
Most players brace for the levels that buff enemies (A8 and A9) and cruise through everything before them. In practice the run-ender rates spike earlier: A2, A5 and A7 are where climbs stall.
A2 changes the math of every route you take, because healing stops being a full refund. A5 inserts a permanent dead draw into your deck, which quietly taxes every fight for the whole run. A7 deletes your access to the rare cards most decks were quietly counting on. None of these show up as bigger enemy numbers, which is exactly why they catch people off guard.
If you stall at one of these levels, the fix is almost never "play better" — it is drafting differently. Leaner decks, earlier commitments, and picks that do not assume a rare is coming to save you.
A climb order that actually works
Climb one level at a time and win at each before moving up. Jumping two or three levels at once feels efficient and usually costs more total time, because losses at too-high levels teach you nothing except frustration.
Win early and often rather than perfectly. A sloppy A1 clear that unlocks A2 is worth more than five abandoned A1 runs where you tried to make the prettiest deck possible.
Keep one character as your climber and take them up the ladder first — you will relearn each modifier on a deck you already understand, and the unlocks on your secondary characters will go faster because the lessons transfer.
If a level keeps beating you, drop down one level, win twice, and come back. Confidence is a resource in this game, and it refills faster with wins than with wiki reading. And if you would rather climb with friends, note that multiplayer tracks Ascension separately — our co-op guide explains how that works.