How many Ascension levels are in Slay the Spire 2?
There are 10 Ascension levels. STS1 had 20 levels, but STS2 compresses the difficulty curve into 10 levels with individually stronger modifiers.
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System GuideVerified March 17, 2026
Ascension System Guide
Slay the Spire 2 has 10 Ascension levels that stack cumulative modifiers from Swarming Elites to Double Boss. This guide covers every level, how to unlock them, per-character tracking, and strategy for climbing.
GamerBlurb: Ascension Modifiers Full ListGAMES.GG: Ascension GuidePCGamesN: All Ascension levels in STS2
Ascension is the post-victory difficulty ladder in Slay the Spire 2. After you beat Act 3 with any character, Ascension 1 unlocks for that character. Each subsequent level adds a new modifier on top of every previous one, and at Ascension 10 you fight two bosses back-to-back at the end of Act 3.
The system tracks progress independently per character. Reaching Ascension 6 on Ironclad does not give you Ascension 6 on Silent. In co-op, the run defaults to the lowest unlocked Ascension level among all party members.
Verification note
All 10 Ascension modifiers verified across the Slay the Spire Wiki, PCGamesN, GamerBlurb, TheGamer, and GAMES.GG. Per-character tracking and co-op rules confirmed by TheGamer and the wiki.
Fast takeaway
This guide is built around one practical question, so you can use it during a run instead of digging through a broad overview.
If the answer depends on a mechanic, a character system, or a recent patch, the related links show you what to open next.
Use this when you want a direct answer instead of a broad overview.
Follow the related links if this decision depends on a mechanic, character system, or co-op rule.
Check the update pages whenever balance changes might shift the recommendation.
All 10 Ascension levels and their modifiers
Every modifier stacks cumulatively. At Ascension 10 you play with all 10 modifiers active simultaneously.
- Ascension 1 — Swarming Elites: ~60% more Elites spawn on the map. More forced hard fights, more relics if you can survive them.
- Ascension 2 — Weary Traveler: Ancients heal only 80% of your missing HP. The between-act healing safety net shrinks.
- Ascension 3 — Poverty: Enemies and treasure chests drop 25% less Gold. Shop purchases and card removals become scarcer.
- Ascension 4 — Tight Belt: Start each run with 1 fewer potion slot. Fewer emergency answers for hard fights.
- Ascension 5 — Ascender's Bane: Start each run with the Ascender's Bane curse card in your deck. A permanent draw dilution that must be removed or managed.
- Ascension 6 — Gloom: 1 fewer Rest Site per act. Fewer chances to heal or upgrade cards between fights.
- Ascension 7 — Scarcity: Rare and upgraded cards appear half as often in rewards. Building toward specific archetypes becomes much harder.
- Ascension 8 — Tough Enemies: All enemies have more HP. Fights last longer, which compounds every other modifier.
- Ascension 9 — Deadly Enemies: All enemies deal more damage. Combined with Tough Enemies, combat is significantly more punishing.
- Ascension 10 — Double Boss: Fight two bosses at the conclusion of Act 3. The ultimate deck check — your build must handle two consecutive boss-tier fights without a rest between them.
How to unlock Ascension
Beat any Act 3 boss with a character to unlock Ascension 1 for that character. Each subsequent level unlocks by completing Act 3 at your current highest Ascension level. You can select any previously unlocked level when starting a run.
Ascension progress is per-character. Ironclad, Silent, Defect, Necrobinder, and Regent each have their own independent Ascension ladder. In co-op, all players must have the target Ascension level unlocked, and the run uses the lowest level among party members.
Why cumulative stacking matters
The real difficulty spike in Ascension is not any single modifier — it is the compounding effect. Ascension 8 (Tough Enemies) by itself is manageable. Ascension 8 with Poverty (25% less gold), Gloom (fewer rest sites), Scarcity (fewer rare cards), and Swarming Elites (more forced hard fights) is a fundamentally different game.
Each new modifier does not just add difficulty; it makes every previous modifier worse. Less gold means fewer card removals, which means Ascender's Bane stays in your deck longer, which dilutes your draws against enemies that now have more HP and deal more damage.
Strategy for climbing
The players who climb fastest focus on one character at a time. Deep knowledge of a single card pool, relic interaction set, and archetype space is worth more than shallow familiarity with all five characters.
- Deck thinning is critical — Remove Strikes and Defends through merchants, events, and Ancients. A tight 15-20 card deck draws its key cards far more consistently than a bloated 35-card pile, and Scarcity (Ascension 7) makes every card choice count.
- Prioritize relics over card hoarding — Elite fights give relics, and relics provide passive value across every combat. Target 2-3 elite fights per act when your deck can handle them.
- Treat HP as a resource, not a score — Spending 10 HP to beat an elite cleanly and gain a relic is almost always worth it. Ironclad's (6 HP per combat) makes this even more forgiving.
- Draft for survival first, synergy second — At Ascension 7+, rare cards appear half as often. Build a functional deck from commons and uncommons, then add synergy pieces if they show up. Forcing a specific archetype at high Ascension is how runs die in Act 1.
- Save potions for elite fights and bosses — With Tight Belt removing a potion slot, each remaining potion is more valuable. Do not waste them on normal combats.
- Remove Ascender's Bane early — At Ascension 5+, spending gold or an event choice to remove the curse card is almost always correct. The draw dilution costs you more over a full run than the gold costs up front.
Character-specific Ascension notes
Ironclad is the most forgiving Ascension climber because offsets chip damage and Strength scaling stays functional even with common cards. Strength-based decks using , , and are the most consistent path because the key cards are common and uncommon rarity.
Silent handles high Ascension through Wraith Form and draw tools that let the Sly discard engine function even in bloated decks. Poison builds scale independently of card rarity, which matters at Scarcity.
Defect needs energy generation more than anything else. Without permanent Focus stacking, Claw decks (, , ) outperform orb-focused builds at high Ascension because they use common cards.
Necrobinder has the highest variance. Doom builds ( for exponential Doom) can trivialize bosses but require specific pieces. Draft individually strong 1-cost cards early and add Doom synergy only when offered.
Regent is the strongest character at high Ascension when the Stars engine assembles. (0-cost cycle), (Stars to Energy), and (7 Stars = 49 AoE) form the core. Do not mix Stars and Forge in the same deck — pick one axis.
FAQ
Does Ascension progress carry between characters?
No. Each of the five characters tracks Ascension independently. Unlocking Ascension 5 on Ironclad does not affect Silent's Ascension level.
Can I unlock Ascension in co-op?
Yes, but all party members must have the target level unlocked, and the run uses the lowest Ascension level among the group. Beating Act 3 in co-op counts toward unlocking the next level.
Sources
GamerBlurb: Ascension Modifiers Full List
AuthorityPer-level modifier breakdown with strategy tips for each Ascension tier.
GAMES.GG: Ascension Guide
AuthorityBeginner-to-advanced Ascension strategy with per-character recommendations.
PCGamesN: All Ascension levels in STS2
AuthorityAscension modifier list with cumulative stacking explanation.
Slay the Spire Wiki: Ascension (STS2)
AuthorityComplete Ascension level list with modifier descriptions and unlock requirements.
TheGamer: How To Unlock Every Ascension Level
AuthorityAscension unlock chain and co-op Ascension rules.