Scales of War
In some settings, strict laws prohibit the possession and use of poison, but a black-market dealer or unscrupulous apothecary might keep a hidden stash. Characters with criminal contacts might be able to acquire poison relatively easily. Other characters might have to make extensive inquiries and pay bribes before they track down the poison they seek.
The Poisons table gives suggested prices for single doses of various poisons.
Crafting and Harvesting Poisons
During downtime between adventures, a character who is proficient with a poisoner’s kit can craft poison. The character must have supplies costing half the list price of the poison, along with any special ingredient. It requires a full day of work to produce one dose of poison.
A character can attempt to harvest special poison ingredients from a poisonous creature, such as a snake, wyvern, or carrion crawler. The creature must be incapacitated or dead, and the harvesting requires 1d6 minutes followed by a DC 15 Intelligence (Nature) check. (Proficiency with the poisoner’s kit applies to this check if the character doesn’t have proficiency in Nature.) On a successful check, the character harvests enough poison for a single dose. On a failed check, the character is unable to extract any poison. If the character fails the check by 5 or more, the character is subjected to the creature’s poison.