Silent Build — Slay the Spire 2 Guide

The Silent is back as the agile "Rogue" of the Spire — a master of a thousand cuts and silent toxins who controls fights with superior card draw and debilitating debuffs. Slay the Spire 2 gives her one brand-new keyword, Sly, which the community guide calls probably the most powerful mechanic on any character, and this guide covers her three kill routes: the Sly discard engine (best by far), Shiv spam, and Poison inevitability — plus the block-and-velocity core that every Silent deck is built on.

How the Silent Works

Sly reads "if this would be discarded, play it instead." Functionally, discarding a Sly card is like gaining free Energy and a free card play: if Acrobatics makes you discard a Haze, the Haze simply fires for free on its way to the discard pile. Calculated Gamble with Sly in hand "plays most of the cards in your hand for free and then draws seven." Any card that says "discard a card" becomes pure upside, and the video guide suspects the mechanic will be nerfed — Acrobatics has already moved to uncommon on the beta branch.

Poison is damage over time, and it ticks at the start of the enemy's turn — which means statuses like Beckon or Infection still hurt you on end of turn even if the poison is about to kill the enemy, and since Poison is itself a status, Artifact blocks it. Its math is the reason to care: 7 Poison deals its triangle number, 7+6+5+4+3+2+1 = 28 total damage, and "as far as I'm aware, there's nothing that does 28 damage unupgraded for two" — the catch is the fight must last seven turns. Poison upgrades are deceptively strong: Snake Bite going from 7 to 10 Poison nearly doubles its total damage (27 in the first three turns versus 18). Accelerant doesn't raise the total — it cashes the latent damage faster.

Shivs are 0-cost attacks that deal 4 damage and Exhaust. Two relics are explicitly called run-defining for her: Shuriken and Kunai, which grant +1 Strength or +1 Dexterity for every 3 attacks played in a turn — on the Silent that turns a Blade Dance into 12 damage plus a Strength, or 10 damage plus a Dexterity.

Know the starter deck: the Silent begins with an extra Strike and Defend, plus Ring of the Snake (2 extra cards on turn one), Neutralize and Survivor. That makes her one of the tankiest starters but starved for damage, so early damage cards are a top priority. You can't realistically remove all the Strikes, so pick one of two plans: grind removals, or lean into her best-in-game card draw and build a bigger 30–40 card deck where Strikes barely register. Mobalytics lists her strengths as a fast multi-card playstyle, easy Weak and block scaling, and Retain/draw consistency; her weaknesses are discard complexity for new players, unreliable energy generation, and low early damage. One structural note that surprises veterans: the Silent effectively has one archetype with variations — the best decks mix all of the styles below, and 46% of her card pool is playable in any deck, so the real risk is taking too many good cards.

Build 1: The Sly Discard Engine (Best Route)

Play pattern: stack discard enablers and Sly payoffs until "discard a card" means "play a card for free." The video guide is blunt: "right now Sly is just so good that there's almost no reason to do anything else."

Core cards:

Card	Cost	Effect	Why it earns a slot
Prepared	—	Draw and discard (upgraded: draw 2, discard 2)	The best enabler — upgraded Prepared is "twice as good"
Acrobatics	—	Draw cards	"You'll never stop taking Acrobatics until the day you die"; now uncommon on beta
Calculated Gamble	—	Discard your hand, redraw it	With Sly in play it reads "play most of your hand for free, then draw seven"
Tools of the Trade	—	Filters your hand every turn	Three copies solve the archetype: a guaranteed discard every turn means a free Sly card every turn
Dagger Throw	—	Damage plus draw 1, discard 1	Take every copy in Act 1; weaker in Acts 2–3 as Acrobatics/Prepared outclass it
Backflip	—	Draw plus Block	"There's almost no limit" — the video would happily run six
Hidden Daggers	0	Two discards that also grant two Shivs	The bridge card: two discards for Sly plus entry into the Shiv plan
Hand Trick	—	Gives Sly to any Skill in your hand this turn; also Blocks for a lot	Great once you have plenty of discard — Hand Trick a Backflip, then discard it for a free play
Well-Laid Plans	—	Retain cards at end of turn	Retain discard enablers until you find Sly cards (or vice versa) — removes the archetype's only variance
Haze	—	Applies Poison (10; upgraded 21) — and it's a Sly card	The best Sly payoff: it "kills very quickly if you can play it two or three times"
Flick Flack	—	Damage to all enemies, and a Sly card	Effectively free with any discard; the video likes it even more than Ricochet overall
Ricochet	—	Attack, and a Sly card	Very strong with Shuriken (Strength); excellent against bosses; Ricochet + Envenom approximates Haze

Relics: Ring of the Snake (the extra turn-one draw feeds Backstab and the whole discard plan) and Shuriken, whose Strength makes free Ricochet plays snowball.

How to pilot it: Tactician (Energy when discarded) still works — upgraded especially — but is no longer necessary: discarding a Sly card and getting the play for free is worth as much as the Energy. Momentum Mori is fine through early Act 2, after which free Sly plays beat spending Energy. For the kill itself, "you kind of just kill with whatever" — Corrosive Wave, the Sly payoffs, plus After Image and Serpent Form as extra win conditions.

Strengths and weaknesses: the strongest plan on arguably the current best character; the only real failure mode is lacking discard enablers early — Haze in particular is a bad card in Act 1 without them.

Build 2: Shiv Spam

Play pattern: flood cheap attacks and multiply them. The caveat up front: this build is somewhat rare-dependent — "if you don't get Fan of Knives, it's kind of hard," but with the rares it's excellent.

Core cards:

Card	Cost	Effect	Why it earns a slot
Up My Sleeve	—	Shiv generation whose cost decreases until it's 0	"Probably the best Shiv card" — what Blade Dance used to be
Leading Strike	1	11 damage at worst; beta version makes two Shivs	A "permanent Blade Dance" that bridges you into the archetype
Blade of Ink	—	Beta version makes three Inky Shivs	"Kind of just a Blade Dance with upside... a really good card now"
Blade Dance	1	12 damage in Shivs; now Exhausts	Low risk — it removes itself, so it barely counts against your deck size
Cloak and Dagger	—	Shivs plus Block	Only take it upgraded
Accuracy	—	Shivs deal more damage	The classic Shiv payoff
Fan of Knives	—	Makes your Shivs hit all enemies	The rare that makes or breaks the build
Knife Trap	—	Shiv payoff that grows with every Shiv played	"Probably the best Shiv payoff" — the card the video is most excited to open; dead weight before you have Shivs
Serpent Form	—	Power that boosts your Shivs (4 → 6 per the video)	Take it even before the payoffs — "it kind of just solves every fight"
Strangulate	—	Heavy single-target damage	Excellent in Act 1; falls off by Act 3
Finisher	—	Damage per attack played this turn	Fine, but Knife Trap, Envenom and Serpent Form do the job proactively

Relics: Shuriken and Kunai — on this character they're run-defining, converting every spam turn into permanent Strength/Dexterity.

How to pilot it: draft the entry generators first (Up My Sleeve, Leading Strike, Blade of Ink, Blade Dance), and only then the payoffs — Accuracy and Knife Trap do literally nothing without Shivs in the deck.

Strengths and weaknesses: explosive multi-card turns and the best AoE route on the character; heavily reliant on the right rares appearing.

Build 3: Poison — Inevitability

Play pattern: "you're really just a block deck." Poison needs no synergy to kill — one well-timed source scales to 450+ damage if the fight runs long — so the entire build question is how long you can survive. Priority one is defense: Footwork, Abrasive, Leg Sweep, Shadow Meld and Well-Laid Plans come before any Poison card.

Core cards:

Card	Cost	Effect	Why it earns a slot
Noxious Fumes	1	Poison every turn, passively	"The best inevitability": ~150 damage in 10 turns, ~450 by turn 20 — a full damage solve for one Energy; the upgrade roughly doubles how fast it kills
Snake Bite	2	Applies Poison (7; upgraded 10)	28 total damage unupgraded; take it highly in defensive decks
Bouncing Flask	—	Multi-apply Poison	A variant of Snake Bite that stacks
Deadly Poison / Poison Stab	—	Straightforward Poison application	Mediocre individually, decent once stacked — Poison scales with Poison
Aces	—	Poison application, and a Sly card	"Probably the best poison card because it's just free"
Corrosive Wave	—	Poison scaling	Named among the cards that can single-handedly kill a boss if the fight goes long
Burst	—	Doubles the next card's effect	Burst into Bouncing Flask or Snake Bite: 9 Poison becomes 18 — roughly four times the total damage
Exhumer	—	Catalyst-style Poison multiplier	"Speeds up the clock so fast" — hard to slot until your deck has enough Poison
Bubble Bubble	—	Late Poison payoff	Only good once Poison is already stacked — effectively free with Noxious Fumes; the one Poison card not to take early
Blur	—	Retains Block into next turn	Situational survival tech for the long game
Mirage	—	One-time Block scaling with Poison	Fine in a pinch against bosses, despite the Exhaust

Relics: the material recommends no specific relics for Poison — the build lives or dies on Block cards, not relics.

How to pilot it: survive first, poison second. Block with Footwork-stacked Dexterity, drop Noxious Fumes, and let the triangle numbers work; supplement with Burst lines. The fight should go long — that's the plan, not a problem.

Strengths and weaknesses: the most reliable scaling in the game for long fights, and it asks nothing of your deck's other cards; it's simply slower than Sly, which is why the video ranks it third without calling it bad.

The Universal Core: Block, Dexterity and Card Velocity

Every Silent deck mixes the routes above onto the same defensive skeleton. These cards go in essentially any build — "you're really never turning down Adrenaline":

• Footwork — stack Dexterity until nothing hits you ("you can take a lot of these and just become invincible; once you're invincible, you can kill with whatever").
• After Image — Block for every card played; stacks in multiples and turns card spam into full Blocks (one Defend blocking for 24 has happened).
• Well-Laid Plans — retention that deletes draw variance; retain Leg Sweep (11 Block, 2 Weak — "essentially means you take no damage") for the boss's attack turn.
• Tools of the Trade / Adrenaline / Escape Plan — velocity and free card plays; "with two Tools of the Trade you could generally win runs without playing any cards."
• Untouchable — "so much better than it looks": effectively a zero-Energy Block (9 on main branch per the video, 6 after the beta nerf — either way, Prepared into it is free mitigation).
• Piercing Wail — Weak for multi-hit enemies; take the first two or three, it self-Exhausts.
• The Hunt — more card rewards, and using it on a boss grants double rare rewards; "if you get it at any time in Act 1, just take it."
• Malaise — buys enormous amounts of time when set up big.

Which Route Should You Pick?

• Sly whenever the enablers appear — it's simply the strongest plan and merges with everything.
• Shivs if early rares (Fan of Knives, Knife Trap) show up, ideally alongside Shuriken.
• Poison when your drafts skew defensive — it turns "I can't die" into a win condition.
• In practice, expect every run to blend all three; that's how the character is designed.

Related Pages

• Builds Overview — all five characters at a glance
• Tier List — every card ranked by tier