You carefully apply to a weapon a poison that you extracted from local flora and fauna during a rest.

Daily ✦     Poison
Minor Action      Melee touch

Target: One weapon

Effect: The next attack made with the target weapon that hits before the end of the encounter deals an extra ongoing 5 poison damage (save ends). Each Failed Saving Throw: The ongoing damage increases by 5 (to a maximum of ongoing 20 poison damage).
Level 11: Ongoing 10 poison damage (save ends). Each Failed Saving Throw: The ongoing damage increases by 5 (to a maximum of ongoing 25 poison damage).
Level 21: Ongoing 15 poison damage (save ends). Each Failed Saving Throw: The ongoing damage increases by 5 (to a maximum of ongoing 30 poison damage).

Published in Dragon Magazine 386, page(s) 7.