Ascension Guide
Ascension is Slay the Spire 2's difficulty scaling system. Each level adds a new cumulative modifier on top of all previous ones, making runs progressively harder. At Ascension 10, all ten modifiers are active simultaneously.
Ascension 1: Elite Swarm
EasyElite enemies appear more frequently on the map.
Strategy
Plan your paths more carefully. You'll encounter more elites than usual, so make sure your deck can handle them before committing to a path with multiple elite fights. Prioritize early damage cards and front-loaded relics.
Ascension 2: Reduced Healing
EasyRest sites heal 25% less HP.
Strategy
Healing becomes a scarce resource. Consider taking cards that provide sustain (self-heal, lifesteal) and potions that restore HP. Avoiding damage altogether through strong Block cards becomes even more important than before.
Active Modifiers at Ascension 2
Ascension 3: Poverty
MediumYou earn less gold from all sources.
Strategy
Be more selective with shop purchases — you can't afford everything anymore. Prioritize card removals over new cards in the shop, and pick gold-generating relics when offered. Events that give gold become more valuable.
Active Modifiers at Ascension 3
Ascension 4: Fewer Potions
MediumYou start with one fewer potion slot.
Strategy
With fewer potions to fall back on, use them aggressively in elite and boss fights rather than hoarding them. A potion used in a tough fight is worth more than one sitting unused when you die. Potion-generating relics gain value.
Active Modifiers at Ascension 4
Ascension 5: Cursed Start
MediumYou begin each run with a Curse card in your deck.
Strategy
Remove the starting curse as soon as possible — card removal events and shops are your priority early. Alternatively, lean into Exhaust synergies (especially as Ironclad) to turn the curse into fuel. Don't let it clog your draws.
Active Modifiers at Ascension 5
Ascension 6: Scarce Rest Sites
HardFewer rest sites appear on the map.
Strategy
With fewer places to heal and upgrade, every rest site decision matters more. Upgrading a key card can be worth more than healing if your deck is strong enough to avoid taking damage. Plan your route to hit the rest sites that do exist.
Active Modifiers at Ascension 6
Ascension 7: Rare Drought
HardRare cards appear less frequently in rewards.
Strategy
Don't rely on finding that one perfect rare card to carry your run. Build a consistent deck out of strong commons and uncommons. When you do find a rare, make it count — take the one that fits your existing strategy rather than chasing dream combos.
Active Modifiers at Ascension 7
Ascension 8: Tankier Enemies
HardAll enemies have increased maximum HP.
Strategy
Fights last longer, so scaling becomes more important than burst. Cards that grow in power each turn (Strength, Poison stacks, Orb Focus) outperform flat-damage cards. Block becomes more critical since you'll be taking more total attacks per fight.
Active Modifiers at Ascension 8
Ascension 9: Deadlier Attacks
Very HardAll enemies deal increased damage with their attacks.
Strategy
Enemy attacks now punish you harder for every point of Block you're missing. Prioritize defensive cards, Weak application, and damage prevention. Dexterity-scaling characters (Silent, Defect) benefit from stacking Block generation to stay alive.
Active Modifiers at Ascension 9
Ascension 10: Double Boss
ExtremeYou must defeat two bosses at the end of Act 3 instead of one.
Strategy
This is the ultimate test. Your deck needs to survive back-to-back boss fights without a chance to heal between them. Build for sustained power over multiple long fights — scaling damage, reliable Block every turn, and enough HP to tank the inevitable chip damage. Every decision in the entire run builds toward this moment.
Active Modifiers at Ascension 10
General Ascension Tips
Plan Your Path
At higher ascension levels, route planning is as important as deck building. Map out your path before each act to balance risk and reward — hitting too many elites without enough power will end your run.
Potions Are Power
Don't hoard potions for the boss. Using a potion in an elite fight means finishing faster, taking less damage, and entering the next fight in better shape. A potion used early is almost always more efficient.
Deck Size Matters
Smaller decks are more consistent. At high ascension, consistency wins runs. Remove weak cards aggressively and only add cards that genuinely improve your deck's ability to handle the fights ahead.
Upgrade Strategically
Upgrading the right card at a rest site can be worth more than healing. Upgraded cards deal more damage, block more, and cost less — all of which reduce the damage you take over the entire act.
Know When to Skip
Not every card reward is worth taking. Adding a mediocre card to your deck dilutes your draws. Skipping a card reward is a valid and often correct play, especially after Act 1.
Build the Right Deck for Ascension
Check our tier lists to see which cards are must-picks at higher Ascension levels.
View Tier Lists →