Poison Harvesting/Crafting Rules

[Jack of Shadows]

Hey Folks,

Does anyone know where the rules for harvesting/crafting poison appeared? One of my players and I are sure we've seen them but we can't for the life of us remember where. Any help is much appreciated.

Jack

 

[Mystern]

i'm pretty sure the book of vile darkness has a few things about that.

 

[Patryn of Elvenshae]

There's some stuff in Complete Adventurer, as well.