Slay the Spire vs Slay the Spire 2: what actually changed?

Strength scaling with Demon Form plus current-card-pool support like Inflame and Brand is still a primary win condition. The Corruption + Dark Embrace + Feel No Pain exhaust engine is intact. Burning Blood still heals you after every fight.

The biggest loss is Dead Branch — it was removed entirely. Without it, exhaust builds no longer generate infinite random cards. Instead, you thin your deck aggressively and close with finishers like Pact's End (0 cost, 17 AoE damage) or Body Slam. The new exhaust builds are faster and more consistent, but less chaotic.

Shockwave moved from Ironclad-exclusive to the colorless card pool, so every character can now apply Vulnerable and Weak in a single card.

Poison builds still work, but the payoff package is not a one-to-one copy of StS1. Current lists lean on Deadly Poison, Noxious Fumes, Accelerant, and Burst to force faster poison ticks. Shiv builds with Blade Dance and Infinite Blades are intact, and Adrenaline still returns as premium draw and energy.

The game-changer is Sly. Cards with the Sly keyword play themselves for free when discarded from your hand before the turn ends. This transforms every discard card from a cost into a combo enabler. Tools of the Trade, Acrobatics, and Calculated Gamble no longer ask you to sacrifice a card — they ask you to choose which Sly cards get played for free this turn.

Experienced players are calling the Sly discard build the strongest archetype in the current Early Access version, with the highest damage ceiling of any character.

The Orb system (Lightning, Frost, Dark, Plasma) returns, but permanent Focus stacking is gone. In StS1, Defragment plus Biased Cognition let you scale Focus infinitely and win by sitting behind passive Orb damage. That strategy no longer works.

StS2 Defect uses temporary Focus, momentum-based plays, and more aggressive Orb management. You channel and evoke Orbs actively rather than building a passive engine.

Claw decks return as a fan favorite. The 0-cost attack chain with Scrape, All for One, and FTL is back and performs well in the current build.

The Watcher is not in the launch roster. Mega Crit has confirmed she will return during Early Access, but Mantra and Stance mechanics are currently unavailable.

Necrobinder is a fragile spellcaster who fights alongside a skeletal companion called Osty. His core mechanics are Doom (an execution threshold — enemies die when their HP drops to their Doom value), Souls (0-cost token cards that draw 2 then exhaust), and deep exhaust synergies.

Regent is a resource-management character with two currencies: Energy and Stars. Stars persist across turns with no cap, letting you build toward expensive payoff cards like Seven Stars (7 Stars for 49 AoE damage). The Sovereign Blade is a forgeable weapon that grows stronger each time you invest Forge points into it.