サイレント

• Type: Skill
• Cost: 1
• Effect: Apply 5 Poison.

Upgraded

• Cost: 1
• Effect: Apply 7 Poison.

A 1-cost core poison Skill that stacks 5 (or 7) Poison in one shot. Poison deals damage equal to its count each turn, then decrements by 1 — 5 Poison means 5, then 4, then 3 of bleed damage. Played through Burst it stacks 10-14 Poison for 1 cost, and paired with Bubble Bubble it piles on even more. With Catalyst running, each stack's damage triggers an extra time per turn, so long fights scale hard. Top priority card in poison decks.

• Essential inclusion in poison decks. Run multiples to ramp stacks quickly in the early game.
• Combined with Burst, a single turn applies 10-14 Poison — enough to close a long fight fast.
• With Bubble Bubble, lead Deadly Poison to poison the target, then Bubble Bubble for +9.
• Catalyst adds an extra trigger per turn — 5 Poison effectively deals more damage over time.
• With After Image (Block = total Poison), you stack Poison with Deadly Poison and defend through it.

• Burst: play the next Skill twice. Deadly Poison twice means 10-14 Poison in one turn.
• Bubble Bubble: adds 9 Poison to already-poisoned enemies. Deadly Poison into Bubble Bubble reaches 14-16 stacks.
• Catalyst: Poison ticks extra per turn. Stacks laid by Deadly Poison deal more damage overall.
• After Image: Exude Skill granting Block = total Poison. Stack Poison via Deadly Poison, then defend with After Image.

• Silent Corrosive Draw Build (B-tier)
• Silent Poison Build (Key card) (S-tier)
• Silent Poison-Shiv Fusion Build (A-tier)