Slay the Spire 2 cards guide, database, and strategy hub

A new run often looks simple on paper: remove starter cards, add damage, survive elites, and beat the act boss. In practice, most failed runs come from card quality mismatches. Players take too much expensive damage without enough frontload, draft too many defensive tools without a scaling plan, or build a synergy package that only functions if they draw the perfect order. Strong card evaluation avoids that trap. You need to know what your deck is missing right now, what it will need three rewards later, and what future relic or event choices can still solve.

That is why the STS2Tools card database is structured around practical fields. Energy cost matters because turn efficiency wins fights. Card type matters because attack-heavy openings play very differently from skill-heavy control shells. Rarity matters because uncommon and rare cards often define your pathing priorities. Character context matters most of all, because the same numerical value means different things on Ironclad, Silent, Defect, and Watcher.

When you review a card list, start by asking four questions: does this improve my next elite, does it support my best relics, does it help my draw cycle, and does it fit my long-fight scaling plan? If the answer to most of those questions is no, the card is probably filler even if the text looks efficient.

Ironclad wants early attacks that preserve HP without bloating the deck, then transitions into strength scaling, exhaust value, or block engines depending on relics and reward density. Silent values draw, discard, poison, and zero-cost sequencing, but still needs enough immediate damage to avoid bleeding too much life in elite encounters. Defect is often judged by orb tempo: cards that channel orbs, improve Focus, or exploit orb slots become stronger as the deck gains consistency. Watcher has the highest ceiling but punishes bad sequencing, so stance entry, safe exits, and card draw are often more important than raw text power.

The biggest drafting mistake is copying a tier list without checking path context. A premium scaling card can still be wrong if the next elite kills you before it matters. Likewise, a modest-looking common attack can be the exact card that secures a Gremlin Nob or Lagavulin line. Tier lists are useful, but they work best when combined with a searchable database and concrete route planning.

Use the detailed card pages to compare costs, types, effects, and upgraded versions side by side. That makes it easier to see whether you are increasing output, improving consistency, or simply adding redundant copies of effects your deck already has.

The most practical use of a card database is between combats, not before the run starts. After each reward screen, open the relevant character filter and compare the card you are considering with the cards already in your deck. If your deck is short on frontloaded damage, search common attacks first. If your deck is losing because you cannot block reliably, review skills and powers that smooth the worst turns instead of taking another narrow damage piece.

You should also use the database as a planning tool before upgrades. Some upgrades are huge damage breakpoints, some dramatically improve draw efficiency, and others only matter in already-winning decks. By comparing base and upgraded text quickly, you can stop wasting campfires on low-impact improvements.

For that reason, this page links directly to the live card index. The index is built for browsing, while this long-form article explains the decision process behind the raw data. Together they form a better player workflow than either element alone.