Name: “Myah” Mystery Brew
Cutiemark: a spilled potion, resembling a question mark

Mystery Brew is a yellow/magenta unicorn with a notable face-marking resembling a mask, as well as markings on her back and hind legs.
She often wears a green shawl, and occasionally a matching witch’s hat.
Her magic is bubbly, and its color matches her eyes and cutiemark.

Brew is a witch and apothecary who enjoys foraging for ingredients and mixing her own potions, which she sell in markets along her travels.
Brew is morally ambiguous, seeking the pursuit of knowledge in her craft above all else.
She is very passionate about her potion skills, which is often seen as boastful overconfidence. She can get cocky at times. Even she can’t handle her strongest potions.

Her favorite potion ingredient is Poison Joke, because its effects are unique to everyone.
She lucked out, as her effect causes her magic aura to fall into liquid form whenever she releases a spell. And she uses this “bottled magic” as a powerful catalyst for some of her stronger potions.
However, prolonged use of this method as left her drained of her own magic. Significantly limiting her ability to recover her mana without aid from her own potions.

Her most powerful potion is actually one of her hardest to sell, because it sounds too good to be true.
Her signature “mystery brew” is one where she focused her will and desire into a bottle. It can quite literally do anything the user desires. They just have to focus their intent and it will come true, as if they wished it so. No monkey’s paw trickery; no catch. Plain and simple.
Creating this potion drains all of her magic, and requires multiple days to recover her strength and mana.

Mystery Brew lives in a quiet unmarked village in the Everfree Forest. This moonlit town is the home of her coven, a handful of like-minded ponies who also practice various pagan rituals. Whilst its location is a secret, the town does welcome outsiders, especially fellow witch ponies. Those in the know can reach it via waystone.

Brew is quite sexually active, and often seeks out willing stallions. She has a particular weak spot for blue ones.
She can use her potions to transform and/or enhance herself or others.
One guilty pleasure is that she enjoys being passed around a group unprotected, while most of them have partaken in a philter of virility.
Her belly can hold quite the volume.

Much like how some hags like to punish and mess with others, Brew also enjoys her fair share of mischief.
An over-zealous or rude stallion may find himself transformed into a mare by one of her mixtures. Or worse, shrunk down and placed into a bottle to be dealt with later.