You envenom your weapon with a lethal poison that is exceptionally difficult to shake off. Few survive its touch.

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 5 poison damage (save ends). The first time the target takes the ongoing poison damage, the target cannot make a saving throw against the ongoing poison on its turn.

Level 19:

  Hit: As above, but 2[W] + ability modifier damage plus 5 poison damage, and ongoing 5 poison damage (save ends).

Level 29:

  Hit: As above, but 2[W] + ability modifier damage plus 10 poison damage, and ongoing 5 poison damage (save ends).

Update (6/28/2011)
Changed to match July update.

Published in Dark Sun Campaign Setting, page(s) 39.