Poisoncraft

Nefarious Toxins
You can create mixtures designed to debilitate and kill. You need the following things before you can attempt to craft an item with Poisoncraft:
 * A Poisoner's Kit
 * A recipe for the item you wish to create
 * A certain amount of poisoncraft components, represented by their worth in currency

If these requirements are satisfied, you can use downtime to craft poisons. It takes 1 hour of time to craft one dose of poison. Upon completion you successfully craft the object if you succeed on an Intelligence or Wisdom (Poisoner's Kit) ability check against the object's crafting DC. Otherwise, you lose the components used and must start again.

Application Method
The quality of the poison is secondary to the method of application. For example, some poisons are deadly when entering the blood, but completely harmless if eaten.

Injury poisons must be applied to a melee weapon or five pieces of ammunition. On a successful hit that deals damage, the poison will take effect. When applied to a weapon or five pieces of ammunition, the poison remains potent for one minute unless stated otherwise.

Ingested poisons must be eaten or drank in order to take effect. They remain potent for one hour after being mixed into food or drink.

Inhaled poisons must be in the air when the character takes a breath. These poisons can either be placed under a target's nose with a Dexterity (Sleight of Hand) ability check contested by the targets Acrobatics, or tossed at a target within 30 feet as an improvised ranged attack. After performing either of these actions, the poison is rendered inert.