Unwelcome Guest Attack 20Burning Venom
The special recipe dripping from your weapon burns the flesh as it works quickly to kill your foe.
Daily Martial, Poison, Reliable, Weapon
Standard Action Melee or Ranged weapon
Target: One creature
Attack: Primary ability vs. AC
Hit: 2[W] + ability modifier damage, and ongoing 15 poison damage (save ends). In addition, the target loses any immunity or resistance to poison until the end of the encounter.
Published in Dark Sun Campaign Setting, page(s) 41.