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• Type: Power
• Cost: 1
• Effect: At the start of your turn, apply 2 Poison to all enemies.

Upgraded

• Cost: 1
• Effect: At the start of your turn, apply 3 Poison to all enemies.

A Power that automatically stacks 2 Poison (3 Upgraded) on every enemy at the start of every turn. You pay the 1 cost once and it keeps ticking for the rest of the fight. The longer the combat runs, the bigger the payoff — it shines hardest on bosses and hallway fights against multiple enemies. Combined with Catalyst or Corpse Explosion the poison stacks grow exponentially. As an automatic poison source it is the backbone of poison decks, and the psychological comfort of dealing damage without spending a card each turn is real.

• Drop it as early as possible so the stacks accumulate. Turn 1 is ideal whenever the hand allows.
• Hits every enemy, so it spreads poison across whole hallway fights in one go.
• With Catalyst (poison triggers an extra time) each turn's fumes become even more lethal.
• With Corpse Explosion (AoE on every 3rd poison applied), Noxious Fumes' per-turn trigger drives the condition automatically (3 applications = explosion).
• Noxious Fumes has no immediate damage on its own — back it up with damage cards or Deadly Poison early on.

• Catalyst: Power that makes Poison tick once extra. Stacks built by Noxious Fumes deal even more damage every turn.
• Corpse Explosion: AoE 11 damage after every 3 Poison applications. Noxious Fumes' per-turn ticks meet the condition repeatedly.
• Deadly Poison / Bouncing Flask: fast poison stackers. Combine with Noxious Fumes to maximize total stacks.
• After Image: Exude Skill that grants Block equal to total Poison. More Noxious Fumes stacks mean more Block.

• Silent Corrosive Draw Build (B-tier)
• Silent Poison Build (S-tier)