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• Type: Power
• Cost: 1
• Effect: Poison triggers 1 additional time.

Upgraded

• Cost: 1
• Effect: Poison triggers 2 additional times.

Adds 1–2 extra end-of-turn Poison triggers. Poison is the main damage engine in a Poison deck, and Catalyst simply doubles or triples every turn's Poison output. A 30 Poison stack turns 30 damage into 60–90 damage, meaning 1 energy spent on Catalyst equals +30–60 damage every subsequent turn — absurd cost efficiency. One of the top-priority Powers for Poison decks. Upgraded for 2 extra triggers, Poison damage triples. Multiple copies keep stacking, scaling Poison damage exponentially. Paired with Deadly Poison, Blade Burst, Tactician, or other Poison core cards, it sets up crushing per-turn damage once the stack is online.

• Near-mandatory in Poison decks. Higher Poison stacks = bigger Catalyst bonus, so stack Poison first, then benefit maximally.
• Multiple copies stack the trigger count. Two Catalysts = 3 total triggers (+2 extra), tripling Poison damage.
• The effect is permanent — 1 energy buys bonus Poison damage on every remaining turn. Insane value.
• The faster your deck stacks Poison, the better Catalyst scales. Deadly Poison + Blade Burst + Tactician gives consistent large stacks.
• Upgraded version adds 2 extra triggers — strongly worth early upgrade priority.

• Deadly Poison: 5–7 Poison applier. Combine with Tactician to stack Poison every turn and amplify with Catalyst — the core Poison deck combo.
• Snake Bite: 7–10 Poison Retain Skill. With large Poison stacks in play, Catalyst makes per-turn Poison damage spike.
• Corpse Explosion: AoE damage per 3 Poison applications. Catalyst's extra triggers satisfy the condition faster each turn.
• Snake Form: random damage on card plays. Minimal direct synergy but fits the overall Poison deck shell.

• Silent Corruption Draw Build (key card) (B-tier)
• Silent Poison Build (key card) (S-tier)
• Silent Poison-Shiv Hybrid Build (A-tier)