
Description
Double an enemy's Poison. Exhaust.
Upgraded
Triple an enemy's Poison. Exhaust.
Apply Deadly Poison, then use Catalyst to double (or triple upgraded) the stacks. Multiple Catalysts chain exponentially.
Noxious Fumes stacks Poison passively each turn, making Catalyst increasingly impactful the longer the fight goes.
Use Nightmare on Catalyst to add 3 copies to your hand. Playing them in sequence multiplies Poison by 2×, 4×, 8× (or higher when upgraded).
Burst causes the next Skill to play twice. When that Skill is Catalyst, the enemy's Poison is doubled twice — effectively quadrupled.
Catalyst Exhausts on use. Dead Branch adds a random card to your hand when any card is Exhausted, providing extra value.