A good Silent poison build is not a pile of every green card that says “Poison.” It is a control deck with a clear division of labor: a few cards start and accelerate the clock, while draw, Weak, and efficient Block buy the turns needed for that clock to finish the fight. Poison is excellent against bosses and other single targets because its damage keeps growing without asking you to spend every turn attacking. Its weakness is speed. If you spend all of Act 1 collecting slow scaling, ordinary enemies will take half your health before the engine matters. This guide explains how to build the deck from the first reward onward. New to the character? Start with the Silent character page, check exact live card text in the card database, or compare this plan with other characters in the build library.
What the poison deck is trying to do
Your first job is to put a meaningful poison stack on the dangerous enemy. Your second job is to stop spending health while that stack ticks. That sounds passive, but the best turns are tightly planned: apply poison before the end-of-turn trigger, use Weak before a multi-hit attack, and draw aggressively enough to find defense when the enemy attacks. Against a boss, poison becomes a second source of energy because previously played cards keep dealing damage while your current energy goes into survival.
A balanced version usually has three or four reliable poison sources, enough block and Weak to cover bad turns, one or two draw tools, and some immediate damage for small enemies. You do not need ten poison cards. Once you can establish the clock consistently, another mediocre applicator often does less than a good defensive or draw card. The finished deck should answer two questions: “How do I survive until turn five?” and “How do I remove a priority minion now?” If it only answers the first, hallway fights remain dangerous.
Do not force poison because the first reward contains one common. Take an efficient early card, watch the next rewards and relics, and commit when the pieces begin to overlap. An early poison relic, two useful applicators, or a strong scaling payoff is a real signal. One lonely Deadly Poison is simply a good card, not a contract for the whole run.
Card choices: core, support, and cards to skip
Deadly Poison is the clean baseline: one energy, one target, no complicated setup. It is easy to play on turn one and remains useful against bosses. Poisoned Stab is often the better Act 1 pickup because its immediate attack damage helps kill weak enemies while the poison keeps working. Snakebite applies a larger stack, but its two-energy cost competes with defense; take it when your turns can support that price rather than because its number is bigger.
Noxious Fumes gives steady poison to every enemy and rewards longer fights. It is excellent scaling, but it does not solve the turn on which you draw it. Bouncing Flask adds a large amount of poison, especially against one target, while its random distribution is less dependable in a crowded fight. Haze and Corrosive Wave offer area coverage, but three-energy Haze needs a safe turn and Corrosive Wave needs enough draw in the same turn to earn its slot. Judge the whole package, not the word “ALL.”
Bubble Bubble is a payoff, not a starter: it does nothing unless the target is already poisoned. Take it once reliable opening application exists. Accelerant can turn a large stack into a fast kill and is one of the cleanest boss finishers. Mirage converts poison spread across enemies into Block, giving multi-enemy poison a defensive purpose. Outbreak rewards frequent applications and can cover area damage, while Envenom belongs more naturally in attack-heavy decks that happen to use poison than in a slow skill-based control deck.
Outside the poison package, value ordinary Silent fundamentals. Weak reduces the amount you must block, draw finds the right half of the deck, and cheap defense lets you apply poison without eating a full attack. Keep one or two attacks that kill a low-health target immediately. Skip redundant slow powers, expensive applicators you cannot play safely, and speculative payoffs with no enabler. A 24-card deck containing eight “on-theme” cards can be worse than an 18-card deck containing four good ones.
Best relics and how they change your picks
Snecko Skull adds one extra poison whenever you apply poison. It is strongest with effects that apply several separate times, so Bouncing Flask and other repeated applications rise sharply. It does not mean every poison card becomes mandatory; it means frequent, efficient applications beat one awkward expensive card. Twisted Funnel starts every enemy with poison, switching on conditional cards immediately and shaving a setup turn from short fights.
Paper Krane is not labeled as a poison relic, but stronger Weak is exactly what a slow damage plan wants. It often saves more health than a small damage bonus because poison only needs time. Ring of the Snake and other draw relics improve opening consistency: seeing an applicator, defense, and a support card together is more valuable than drawing them in the wrong order over three turns. Energy, card-draw, and dexterity relics are all welcome when they let you apply poison without surrendering defense.
Treat relics as permission, not instructions. Twisted Funnel makes Bubble Bubble easier to use, but it does not make a third conditional payoff sensible. Snecko Skull rewards repeated applications, but a deck with no Block still dies. If an elite gives you discard, attack, or defensive support instead, use that value where it fits. Poison can be the win condition without occupying every card and relic slot.
Upgrade priority at campfires
Upgrade cards that change the speed or cost of your plan first. Noxious Fumes gains another poison each turn, so an early upgrade pays repeatedly in every long fight. Bouncing Flask gains another application, which is a large single-target increase and becomes even better with Snecko Skull. Mirage dropping to zero cost is a major defensive tempo upgrade: it can turn an established stack into Block without taking energy away from the rest of the turn. Accelerant triggering poison an additional time is a finisher upgrade when the deck already builds large stacks.
The common applicators are solid second-wave upgrades. Deadly Poison gains two poison, while Poisoned Stab improves both immediate damage and poison; upgrade the Stab first when Act 1 enemies are still the problem, and Deadly Poison when the coming boss is the bigger check. Bubble Bubble gains more poison and is worth upgrading after you can switch it on reliably. Outbreak gains area damage, which matters if groups are your weakness. Haze gains poison but remains expensive, so cost and safety still matter more than the larger number.
Rest when the next forced fight can kill you. A poison deck often looks stronger on paper than it feels in the first cycle, and a beautiful scaling upgrade does not help a dead run. If health is comfortable, prefer upgrades that make the opening two turns safer or make the boss clock meaningfully shorter; do not automatically upgrade the rarest card.
Act-by-act route and drafting plan
In Act 1, draft for immediate fights. Poisoned Stab is ideal because it performs now and points toward the later build. Deadly Poison is fine, but pair it with front-loaded damage before challenging an early elite. Choose a route with several card rewards and a campfire before the first elite when possible. You are looking for proof that the deck can kill quickly enough, not merely for more scaling. A damage potion can cover the gap and make an elite relic worth pursuing.
By the end of Act 1, aim for at least two useful poison sources, real immediate damage, and enough defense to play a setup card safely. If those pieces never appear, stay flexible and let poison remain a small package inside another Silent deck. Against the boss, apply poison early unless doing so exposes you to a crippling hit. Once the stack is meaningful, stop spending energy on weak attacks just because they are in hand; block, maintain Weak, and let the damage happen.
Act 2 asks for area control and consistency. Multi-enemy poison from Noxious Fumes, Haze, or Corrosive Wave helps, but a direct area attack or Outbreak may solve fast groups sooner. Prefer paths with a useful shop when you have gold for removal, a missing defensive piece, or a key poison card. Take elites when your first two turns are stable and you carry a potion; avoid a forced elite line if your deck still needs several turns before it blocks well.
In Act 3, stop collecting pieces and polish the machine. Remove weak starter attacks, add only draw, energy, premium defense, or a card that fixes a named matchup. Plan the route around the visible boss and your actual health. If the deck already crushes long single-target fights, do not buy another boss solution; spend resources on consistency and on enemies that attack before poison can scale.
How to pilot fights turn by turn
On turn one, read intent before following a script. Against a buffing enemy, play your strongest scaling setup. Against a heavy attack, a modest poison card plus efficient Block is often better than taking 20 damage to land a power. Poison damage is delayed, so health lost during setup is a real cost. When several enemies are present, identify the one that must die first; random application is dangerous if it leaves that target untouched.
After poison is established, calculate the next tick before playing attacks. If the enemy dies to poison at the end of the turn, spend energy on Block, draw, or preparation rather than overkilling it. If it survives by a small amount, immediate damage has a clear job. This simple count prevents two common wastes: attacking something already dead and blocking for extra turns because you did not notice that one attack ends the fight now.
Against bosses, front-load setup but do not empty your hand thoughtlessly. Keep Weak aligned with the largest attacks and use Accelerant after the poison stack is large enough to justify it. Extra draw is valuable only when you can play what it finds, so avoid burning energy on draw after your remaining energy is already committed. The deck wins through patience, not through pressing every green button.
Common mistakes that ruin poison runs
The first mistake is drafting too much poison. Three applicators that arrive on time are better than seven that crowd out Block and draw. The second is confusing scaling with safety: Noxious Fumes can win eventually, but playing it into a huge attack may lose the run immediately. The third is ignoring front-loaded damage. Poisoned Stab and a plain efficient attack often preserve more health in Act 1 than another slow payoff.
Players also overvalue rare cards. Corrosive Wave without draw, Envenom without frequent unblocked attacks, and Accelerant without a large stack are incomplete sentences. Pick the support only after the deck can use it. Another frequent error is taking a risky route because poison is “good against elites.” It is good against long fights only when you can survive the opening. Count health, potions, upgrades, and early defense before committing.
Finally, do not keep attacking after the fight is solved. Poison lets Silent devote later turns to defense; that is the point of the build. Count the tick, cover the enemy intent, and end the turn. Saving six health is more useful than making the final damage number look impressive.