Sly / Discard

S

silent

High 9/10

The most powerful archetype in STS2. Cards with the Sly keyword play for free when discarded, creating explosive combo turns at zero energy cost. JapaneseExport (top 5 STS player) considers this the ONLY Silent build that consistently wins at max Ascension, though Poison remains viable at A10 as a backup. Prepared and Acrobatics at Common rarity make the discard triggers highly accessible, while Sly cards like Tactician and Reflex (both cost 3, unplayable normally) provide the energy and draw engine.

Key Cards
Flick-Flack
Flick-Flack
Calculated Gamble
Calculated Gamble
Acrobatics
Acrobatics
Tactician
Tactician
Reflex
Reflex
PlaystyleHigh-velocity card cycling with free plays from discard triggersUpdated Patch 0.98.1

**Damage Payoff:** The Sly archetype's damage comes from Sly ATTACK cards that play for free when discarded. The two Sly attacks are Flick-Flack (Common, 7 damage to ALL enemies) and Ricochet (Common, 3 damage to a random enemy 4 times). Both are Common rarity, making them highly accessible. A Calculated Gamble that discards a hand with Flick-Flack and Ricochet triggers both for free — 7 AoE damage plus 12 single-target damage at zero energy cost. Sly non-attack cards like Untouchable (9 Block), Haze (4 Poison to ALL), and Abrasive (4 Thorns + 1 Dexterity) provide defensive value and utility when triggered, but Flick-Flack and Ricochet are the damage engine. Sly/Discard is the archetype that embodies Slay the Spire 2's most significant addition to the Silent's kit — and according to JapaneseExport (verified top 5 STS1 player), it is the ONLY Silent build that consistently wins at max Ascension (though A10 players report Poison wins are still possible, just harder). The Sly keyword — cards that play themselves when discarded — transforms the act of cycling your hand from a neutral operation into a stream of free plays. Where other archetypes spend energy playing cards, a Sly deck often generates energy and plays cards simultaneously through carefully engineered discard loops. At its peak, the archetype becomes a true infinite: Calculated Gamble fires, triggering Flick-Flack (7 AoE damage), Ricochet (3x4 random damage), Tactician (gain 1 energy), and Reflex (draw 2 cards) all for free as Sly plays, then draws into another full hand to repeat the sequence indefinitely. JapaneseExport's analysis shows that the Sly mechanic is fundamentally overtuned compared to Poison and Shiv — the free plays generated by discarding create a ceiling that other Silent archetypes cannot match. The consistency rating of 9/10 reflects how accessible the engine is: Prepared and Acrobatics both appear at Common rarity, meaning the core discard enablers show up in nearly every run. Unlike Poison — which just needs Noxious Fumes to start working — Sly/Discard requires a critical mass of Sly cards before any discard trigger becomes meaningful. A single Sly card and Calculated Gamble is nice; three Sly cards and Calculated Gamble is a win condition. The run crystallizes in Act 2 when Tactician and Reflex appear — both are themselves Sly cards (cost 3, effectively unplayable from hand) whose effects only matter when triggered for free via discard. Those two card types are the difference between a discard deck that cycles efficiently and one that generates infinite energy and card draw each time Calculated Gamble resolves. Silent starts with 12 cards (5 Strikes, 5 Defends, Survivor, Neutralize) — more than any other character. Aggressive deck thinning through card removal at shops and events is critical for all Silent builds. Deck thinning is non-negotiable for this archetype. The infinite loop requires that when you draw a fresh hand after Calculated Gamble, that hand contains more Sly cards, Tacticians, and Reflexes rather than Strikes and Defends. A 20-card deck dilutes the loop to the point where Calculated Gamble refills into mostly non-engine cards, killing the momentum. Budget aggressively for card removal at shops — two removals per act is the target. By Act 3, your deck should be eight to twelve cards composed almost entirely of the discard engine. In that state, the Silent achieves something remarkable: a hand that generates more plays and more energy than it costs, cycling through the entire deck every one or two turns and dealing mounting Sly damage that no enemy can outlive.

Card Tier List

Synergy Map

Calculated Gamble + Sly Cards

Build Defining
Calculated GambleFlick-FlackRicochetHaze

Calculated Gamble discards the entire hand for zero energy, triggering every Sly card in the discarded hand simultaneously. With three Sly cards like Flick-Flack, Ricochet, and Haze in hand, Calculated Gamble fires three free plays before drawing a fresh hand. This is the core value generation loop — each Calculated Gamble in a fight effectively multiplies your hand by the number of Sly cards discarded.

Setup difficulty:moderate

Tactician + Reflex Sly Economy

Strong
TacticianReflexCalculated Gamble

Tactician and Reflex are both Sly cards (cost 3 normally, play for free when discarded). Two Tacticians and two Reflexes in a discarded hand via Calculated Gamble triggers all four for free — generating 2 energy and drawing 4 cards before the fresh draw. Combined with other Sly card plays, a Calculated Gamble turn with this setup is energy-positive and card-positive — the defining feature of the infinite variation of this archetype.

Setup difficulty:hard

Acrobatics + Sly Trigger

Nice to Have
AcrobaticsFlick-FlackRicochet

Acrobatics draws three cards and discards one — a controlled discard that lets you cherry-pick which Sly card triggers while improving hand quality. Unlike Calculated Gamble, Acrobatics lets you see the new cards before discarding, enabling more precise play.

Setup difficulty:easy

Priority Picks

1

Act 1

Act 1 for Sly/Discard is about identifying whether the run is going to support the archetype. Look for Sly cards and Acrobatics in the first three card rewards. If both appear, commit. If neither appears by the first elite, remain flexible and consider Poison as an alternative.

Priorities

  1. 1.Pick up any Sly card offered — they are the payoff for every discard trigger.
  2. 2.Acrobatics is the best Act 1 non-Sly pickup — provides draw and one discard trigger per play.
  3. 3.Avoid adding many non-engine cards — this archetype benefits from a lean deck more than most.
  4. 4.Keep Calculated Gamble if it appears; it is a 0-cost card that works even before the engine is complete.

Card Picks

Flick-FlackRicochetAcrobaticsCalculated GambleBlur (defensive, does not conflict)

Key Decisions

Offered a Sly card vs. Calculated Gamble in Act 1

Take the Sly card.

Calculated Gamble without Sly cards is a draw-neutral cycle card. Sly cards need discard triggers to work, but one Sly card plus Acrobatics produces value immediately. Calculated Gamble is best added second or third.

No Sly cards in Act 1

Stay open to Poison — pick up Noxious Fumes or Deadly Poison if offered.

The Sly/Discard archetype requires at least three Sly cards to function well. If Act 1 provides none, Poison is a strong alternative path using the same defensive Silent framework.

2

Act 2

Act 2 is where the engine completes. Tactician and Reflex are both Sly cards (cost 3, unplayable normally) that trigger for free when discarded — Tactician generates energy, Reflex draws cards. Find both of them, add a second Sly damage card or two, and begin removing cards aggressively — deck thinning directly translates to infinite consistency.

Priorities

  1. 1.Tactician is the highest Act 2 priority — its Sly trigger generates energy, making Calculated Gamble turns energy-neutral or positive.
  2. 2.Reflex's Sly trigger draws 2 cards — fills the hand after Calculated Gamble fires.
  3. 3.Untouchable provides defensive value as a Sly card that gives 9 Block when triggered by discard.
  4. 4.Card removal at every shop — thin the deck to accelerate the loop.

Card Picks

TacticianReflexUntouchableHaze

Key Decisions

Have Calculated Gamble and three Sly cards but no Tactician — buy Tactician at shop for 75 gold?

Yes — budget the gold.

Tactician is a Sly card whose effect generates energy when it triggers for free on discard. It converts Calculated Gamble from energy-neutral to energy-positive. It is the single upgrade that turns the engine from good to infinite.

Offered Poison cards in mid-Act 2 when partially committed to Sly

Skip unless Sly engine is clearly failing.

Mixing Poison and Sly/Discard dilutes both engines. If your Sly deck has three or more Sly cards and Calculated Gamble, commit — adding Poison cards at this point slows your cycling without providing enough Poison stacks to matter.

3

Act 3

Act 3 is execution. The engine should be functional by now. Remove any remaining filler cards, ensure you have at least two Tacticians and two Reflexes for energy-positive Calculated Gamble turns, and look for relics that add value to your discard triggers.

Priorities

  1. 1.Remove all remaining Strikes and non-engine Defends.
  2. 2.Acquire a second Calculated Gamble if offered — two copies mean you see it more reliably each turn.
  3. 3.Add Well-Laid Plans if offered — lets you retain Calculated Gamble between turns.

Card Picks

Second Calculated GambleWell-Laid PlansHaze or Untouchable (any remaining Sly cards)

Key Decisions

Act 3 boss has Artifact (blocks one debuff)

Lead with Neutralize to burn the Artifact, then apply Weak on the second attack.

Neutralize is a free 1-damage attack that also applies Weak — it burns the Artifact without wasting a significant card. Your Sly damage does not need the enemy to be Weakened, but every 25% reduction matters over a long boss fight.

Your deck is 12+ cards after removing everything possible

Accept it and focus on Calculated Gamble frequency rather than full-loop speed.

Not every run achieves the perfect 8-card infinite. A 12-card deck with Calculated Gamble still generates significant free damage each time it fires — the loop may not be infinite but the engine is still substantially faster than a normal deck.

Infinite Strategy

Sly Discard Loop

moderate difficulty

With enough Sly cards (including Tacticians and Reflexes, which are themselves Sly cards) in a thin deck, Calculated Gamble becomes energy-neutral or energy-positive while triggering multiple free Sly plays per iteration. Tactician's Sly effect generates energy, Reflex's Sly effect draws cards, and Flick-Flack/Ricochet deal damage — all for free. The loop runs indefinitely, generating unlimited damage from Sly attacks while refilling energy and cards through Tactician and Reflex triggers.

Required Cards

Calculated GambleFlick-FlackTactician

Optional Cards

ReflexAcrobaticsUntouchable

Setup Steps

  1. 1Acquire at least three Sly cards from Act 1 and Act 2 rewards — they appear in multiple card pools for the Silent.
  2. 2Find Calculated Gamble; it appears in Act 1 and Act 2 rewards and occasionally in shops.
  3. 3Add two or more Tacticians and two or more Reflexes — both are Sly cards (cost 3, unplayable normally) whose effects trigger for free when discarded, generating energy and drawing cards respectively.
  4. 4Remove all non-engine cards from the deck to reduce it to eight to ten cards — card removal at shops is mandatory.
  5. 5The loop is ready when your deck contains mostly Sly cards, Tacticians, Reflexes, and Calculated Gamble.

Execution Steps

  1. 1Draw into a hand with Calculated Gamble plus two or more Sly cards.
  2. 2Play Calculated Gamble — discard the entire hand, triggering all Sly cards simultaneously.
  3. 3Sly cards activate for free, dealing damage or applying effects.
  4. 4Tacticians and Reflexes are Sly cards — they trigger for free alongside Flick-Flack and Ricochet. Tactician's effect generates 1 energy each; Reflex's effect draws 2 cards each.
  5. 5Draw into the fresh hand — it contains more Sly cards, Tacticians, and Reflexes from your thin deck.
  6. 6Repeat. Each iteration deals free Sly damage with no net energy cost.

You're Online When...

  • Your infinite is online when Calculated Gamble generates as much energy as you spent on any preceding cards, and your Sly triggers are dealing meaningful damage.
  • A practical signal is when you play Calculated Gamble and end the turn with more energy than you started with.
  • The loop is confirmed when you have cycled your full deck twice in one turn without running out of energy.

Counterplay Warnings

  • Time Eater's 12-card-per-turn cap limits the number of Calculated Gamble plays per turn — burst damage before hitting the cap rather than looping.
  • Enemies with Thorns damage you on each Sly trigger — avoid initiating the full loop against Thorns enemies above 4.

Sources

10 Easy TIPS For SILENT BUILDS
Ic0n Gaming·Mar 11, 2026

Pilot Walkthrough

Overview

Act 1 for Sly/Discard is about identifying whether the run is going to support the archetype. Look for Sly cards and Acrobatics in the first three card rewards. If both appear, commit. If neither appears by the first elite, remain flexible and consider Poison as an alternative.

Priorities

  1. 1Pick up any Sly card offered — they are the payoff for every discard trigger.
  2. 2Acrobatics is the best Act 1 non-Sly pickup — provides draw and one discard trigger per play.
  3. 3Avoid adding many non-engine cards — this archetype benefits from a lean deck more than most.
  4. 4Keep Calculated Gamble if it appears; it is a 0-cost card that works even before the engine is complete.

Card Picks

+ Flick-Flack+ Ricochet+ Acrobatics+ Calculated Gamble+ Blur (defensive, does not conflict)

Card Removals

Strike

Relic Priorities

Ring of the Snake (already held — extra draw on turn 1 accelerates finding Sly cards)Snecko Eye (dangerous — randomizes costs, can conflict with 0-cost Sly/Calculated Gamble)Ornamental Fan (gain Block from triple plays — synergizes with high-card-play turns)

Decision Points

Offered a Sly card vs. Calculated Gamble in Act 1

Take the Sly card.

Calculated Gamble without Sly cards is a draw-neutral cycle card. Sly cards need discard triggers to work, but one Sly card plus Acrobatics produces value immediately. Calculated Gamble is best added second or third.

No Sly cards in Act 1

Stay open to Poison — pick up Noxious Fumes or Deadly Poison if offered.

The Sly/Discard archetype requires at least three Sly cards to function well. If Act 1 provides none, Poison is a strong alternative path using the same defensive Silent framework.

Elite Strategy

Act 1 elites with only partial engine pieces: rely on Neutralize's Weak application and Survivor's Block to survive. Sly cards deal modest damage but every free play helps. Do not take unnecessary risks with low HP.

Boss Strategy

Act 1 bosses are challenging without a complete engine. Use whatever discard triggers you have accumulated and supplement with direct attacks. Accept that Act 1 boss will be harder for this archetype than Poison.

Bad RNG Fallback

Bad RNG Fallback

Without enough Sly cards (fewer than three by mid-Act 2), the discard engine lacks payoffs — discarding is just cycling. Pivot to Poison if Noxious Fumes or Accelerant has appeared. Acrobatics and Calculated Gamble remain useful as defensive tools and deck cyclers in the Poison archetype.

If you don't see:

Flick-FlackCalculated GambleAcrobaticsTacticianReflex

Consider pivoting to:

  • poison
  • shiv

Multiplayer Tips

Critical

Sly cards deal flat damage per trigger, which is proportionally weaker against MP-scaled enemy HP — but if the loop is truly infinite, HP scaling does not matter because you can cycle unlimited damage. A non-infinite Sly deck (12+ cards) will feel the HP inflation and kill noticeably slower.

Sly damage per trigger is fixed. Against a 350-HP MP enemy vs. a 200-HP solo enemy, a non-infinite Sly deck needs 75% more triggers to kill. A true infinite loop (8-card deck cycling endlessly) bypasses this because you can always generate enough triggers. Prioritize deck thinning even more aggressively in MP.

Calculated GambleFlick-FlackRicochet
Recommended

Most Sly attacks like Ricochet hit a single target. Pick one enemy per turn and stack all Sly damage on it to secure kills rather than spreading damage. Flick-Flack is the exception — it hits all enemies and becomes higher priority in MP for AoE pressure.

Killing one enemy removes its attacks from the fight entirely, reducing total incoming team damage. Spreading Sly triggers across multiple scaled-HP enemies leaves all of them alive and attacking. Prioritize Flick-Flack over Ricochet during drafting in MP for the AoE coverage.

Flick-FlackRicochet
Optional

If a teammate is running Poison Silent, adding Envenom to your Sly deck lets your high card-play volume apply Poison rapidly while they provide Accelerant for the tick multiplier.

Envenom applies 1 Poison per attack played. A Sly deck playing 8-10 cards per turn via the Calculated Gamble loop applies 8-10 Poison per turn passively, which a Poison teammate's Accelerant then doubles or triples. This hybrid is stronger than either archetype alone in MP.

Envenom

Sources