Sly

NamuWiki's Silent card list names exactly eight cards that ship with Sly printed on them. The common pool holds Flick-Flack (1 cost, Sly, 7 AoE upgrades to 9) and Ricochet (1 cost, Sly, 3 damage × 4 random, upgrade hits 5 times). The uncommon pool adds Untouchable (1 cost, Sly, 9 block upgrades to 12), Reflex (1 cost, Sly, draw 2 upgrades to 3), Haze (1 cost, Sly, 4 poison to all upgrades to 6), Tactician (Sly, grants energy), and Abrasive (Sly, +1 Dex +1 Thorns upgrading Thorns to 6).

Sneaky is the co-op-only Power that caps the list. When another player attacks, you gain 1 block. Sneaky is not discardable in the normal sense but it shares the keyword tag because it scales off Sly-centric discard triggers through Master Planner.

Sly is not limited to cards that print the keyword. Hand Trick (uncommon, 7 block upgrades to 10) adds Sly to one skill in hand for the turn, which lets you use a random Piercing Wail or Leg Sweep as a free discard payoff. Master Planner is the rare power that makes every skill card you play gain Sly, which is the true Sly deck engine.

Once Master Planner is in play, the entire discard pipeline becomes free damage. Calculated Gamble (exhausts, dumps your hand and redraws the same count) discards 4-5 skills in one shot, each of which resolves on the way out if Master Planner is active.

Silent's discard outlets all interact directly with Sly. Acrobatics (1 cost, draw 3 discard 1, upgrades to draw 4) and Survivor (1 cost, 8 block discard 1, upgrades to 11 block) are the two starter-level Sly enablers. Calculated Gamble (0 cost, exhaust, discard all and redraw) and Storm of Steel (discard all, create daggers per discard) are the big-swing enablers.

Dagger Throw (1 cost, 9 damage, draw 1, discard 1) and Prepared (0 cost, draw 1 discard 1 upgraded to 2/2) are the quiet workhorses. With two Prepared+ in hand and a Sly card in hand, you convert four discards into four free plays without spending any energy on the discard itself.

NamuWiki's Silent archetype section lists Sly as its own named deck type with a specific recommended card list. The core is Acrobatics+, plus every printed Sly card you can find (Flick-Flack, Ricochet, Untouchable, Reflex, Haze, Tactician, Sneaky, Abrasive), plus Survivor, Dagger Throw, Prepared, and the heavy finishers Memento Mori and Pinpoint.

Memento Mori is the keystone damage card: base 8 damage, plus 4 extra damage per card you discarded this turn (upgrade to 10 base / 5 per discard). Pinpoint is the skill-rebate finisher at 17 damage base, and it reduces the next skill cost by 1 each time you play a skill on the turn.

The Sly deck has the lowest average card rarity of the three Silent archetypes, which is why it unlocks fast. Its strengths are a high ceiling, fast damage tempo, and rich synergies that stack without requiring a single rare. Its weaknesses are a weak opening turn, high dependence on upgrading Acrobatics and Tactician, and total collapse if the enemy locks your hand (Byrdonis, Vantom).

NamuWiki's recommended relic list names Letter Opener, Tingsha, Gambling Chip, and Tough Bandages as the four Sly-deck priorities. Letter Opener turns every third discard into 5 damage, which pairs with every Sly free-play. Gambling Chip replaces your opening hand at fight start for 1 HP, making the Sly deck's weak first turn survivable. Tough Bandages heals 3 HP every time you discard.

The biggest mistake is picking Sly cards without a discard engine. A Ricochet in your hand with no discard outlet is just a 1-cost 3×4 attack, which loses to every common enemy. You need Acrobatics, Survivor, Dagger Throw, or Prepared in the deck before Sly cards start paying out.

The second mistake is skipping upgrades on the discard enablers. Acrobatics+ shifts from 3 draw to 4 draw, which is a full extra card every turn. An unupgraded Calculated Gamble burns itself on exhaust, while the upgraded version keeps the card. Do not take Sly payoffs over upgrades on discard enablers at the campfire.