What class should new players start with?
Ironclad is the safest launch-week recommendation because he lets you learn the sequel's new universal systems without also learning a brand-new class resource like Stars or Doom.
A first-week guide for players who want to learn Slay the Spire 2 without drowning in new mechanics, co-op noise, or premature tier-list advice.

The right way to start Slay the Spire 2 is not to memorize every new keyword before your first run. It is to learn the sequel in layers.
The game already launched with more content than the original Slay the Spire had at release, so new players get the best results by focusing on a stable first character, understanding the new system words, and keeping their first few runs clean and readable.
Verification note
Built from official launch information, the public mechanic reveals, and launch-week player questions. The recommendations stay deliberately conservative.
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.
Run one should be about understanding the game's new vocabulary and rhythm, not about forcing a fancy build you saw on day one social media. Run two should push a little harder on routing and rewards. Run three is when you start experimenting with a new class or co-op.
That three-run structure works because the sequel adds more systemic complexity than the first game had at launch. You do not need to solve everything at once to make rapid progress.
Start with the sequel-only rule words: Enchantments, Quest Cards, Afflictions, Alternate Acts, and whichever character-specific mechanic your chosen class uses. Those terms drive most of the confusion new players feel when a run suddenly gets strange.
If you understand the rule layer, you can make better decisions even before you know the full card pool.
Do not treat every rare card as an auto-pick. Do not assume old Slay the Spire 1 heuristics transfer untouched. And do not let generic 'best build' posts convince you the game is already solved.
The strongest beginners are the ones who keep decks small, answer immediate problems first, and learn one new system at a time.
More decision guides
FAQ
Ironclad is the safest launch-week recommendation because he lets you learn the sequel's new universal systems without also learning a brand-new class resource like Stars or Doom.
Solo is the cleaner first-learning environment. Co-op is great, but the extra communication can hide why a run succeeded or failed.
Start with the mechanic pages for Enchantments, Quest Cards, Afflictions, and your chosen character's signature keyword.
Sources
Mega Crit early access launch post
OfficialOfficial launch article for the current early access build.
Neowsletter: Afflictions
OfficialOfficial explanation of enemy-applied Afflictions on cards.
Neowsletter: Enchantments
OfficialOfficial explanation that Enchantments are run-long card modifiers.
Neowsletter: Quest Cards
OfficialOfficial introduction to Quest cards and the Byrdonis Egg example.
Official Steam FAQ
OfficialPinned by Mega Crit. Confirms the launch time, price, platforms, Steam Deck support, and early access range.