Avara's Astounding Apothecary

From publisher blurb: Adventurers often need magical potions. But there’s nothing that says a potion maker has to be good at it! Here’s a useful thing to have in your GM’s Toolkit: an incompetent potion maker you can drop straight into your fantasy campaign. Avara’s Astounding Apothecary is owned by none other than the illustrious Marzi Avara, a powerful mage and legendary potion maker (or so she claims). In reality Avara is a dangerous sociopath who enjoys mixing ingredients to see what random and unexpected fates befall her customers...