"In preparation for an assignment, an assassin applies Hanged Man's Venom to his blade. He grinds the ingredients with a mortar and pestle until he gets a thick paste, and then lightly coats the tools of his trade while taking care to keep the substance from touching his skin. Then comes the hard part, but even a hastily aimed slash can be fatal if Hanged Man's Venom slips into the wound."
Hanged Man's Venom poisons wounded opponents, yet it is ineffective against monsters whose physiology differs greatly from that of humans. It offers a "considerable" chance of poisoning a foe.