Pharmacist

You studied and learnt the Naturemaster skill called Brewery, that lets you brew different kinds of potions out of different natural ingredients, using the Brewery System.

If you get this edge on character creation, you'll need to invest skill points to get the firs 1D4 die in the skill.
If you do not get this skill on character creation, you'll need to seek a Naturemaster willing to teach you, and to learn the basics, it will take you at least one month of off-game time. Nonetheless, if you achieve this, you automatically get the first 1D4 level in the skill, and you do not need to invest extra experience to get it.