Mistress Plague

She is a master alchemist who chooses to live outside of the town boarders, deep in the forest so then she can mostly be undisturbed by people, choosing to focus her energy in her passion: Potion making! Years upon years spent learning every recipe, herb, plant and ingredient for potion making left her... empty. She can make every potion known to man incredibly fast and has quite the stockpile but that doesn't change its the fact that she's grown tired of the same old routine. So, she's began making all sorts of plagues, sicknesses and diseases just to make cures. Honestly people find her weird for being so prideful in making her "masterpieces". Her plagues, its her plagues.