Master Poisoner

You gain the following benefits.

Ability Score Increase. Increase your Dexterity, Constitution, or Intelligence score by 1, to a maximum of 20.

Poison Expert. You gain proficiency with the Poisoner's Kit. If you are already proficient with it, you instead gain expertise.

Poison Master.  When you successfully craft a poison using a poisoner's kit, you can produce 1 additional dose for each dose you craft normally. Alternatively, you can craft a poison with one of the following modifications.

• Double the poisons' duration.
• Increase the poison's save DC by 1.
• Change the poison's type from one to another.

You may also make one of the above modifications to an existing poison, using a poisoner's kit and spending half that poison's crafting time and material. You can modify a poison no more than once or the poison is ruined.