These potions are mentioned in the trading card game, which means that they’re not canon.
Angel’s Trumpet Draught potion
ingredients: unknown, but may include Angel’s Trumpet
Effect unknown
The TCG card artwork shows a flask shaped like a horn, with the bell of the “horn” forming the bottom of the flask and the “mouthpiece” as the stoppered top. The flask in the picture is engraved with a stylized angel of the type often shown on Victorian funeral monuments (TCG).
It is worth mentioning that the flowering plant commonly known as Angel’s Trumpet is poisonous. The plant is so named for the shape of the flowers, a shape which somewhat resembles that of the flask in the picture (although they are peach-coloured whereas the flask is made of a grey metal, possibly silver).
Baneberry Potion potion
ingredients: unknown, but may include baneberries
effect unknown
The TCG card artwork shows a transparent flask containing a reddish-coloured liquid in which a small branch with green leaves and clusters of red-and-white berries is suspended (TCG). This is a little odd – some varieties of the plant have red berries while others have white berries, but both together are unusual. The plant is very poisonous, hence its name.
Death-Cap Draught potion
ingredients: unknown, but may include Death-Cap mushrooms
Exact effect unknown, but presumably poisonous
The TCG card artwork shows a flask with an outsized stopper shaped like the cap of a mushroom (TCG).
Dragon Poison potion
ingredients: unknown
Exact effect unknown, but presumably poisonous
The TCG card artwork shows a flask shaped like a crouching dragon, with a stoppered opening on its back (TCG).
eel eyes potion ingredient – creature
Mentioned as a potion ingredient, use unspecified, but the card text suggests that it may have the effect of augmenting vision (TCG).
Fatiguing Fusion potion
ingredients: unknown
Exact effect unknown, but presumably causes fatigue
The TCG card artwork shows fumes rising from an unstopped flask in front of a yawning student (TCG).
Fungiface Potion potion
ingredients: unknown
Causes the drinker’s face to break out in fungi such as mushrooms and toadstools
The statement of the potion’s effects comes from examining the card’s artwork (TCG)
Manegro Potion potion
ingredients: unknown
Causes the hair on the drinker’s head to grow out rapidly with the texture of a lion’s mane.
The statement of the potion’s effects comes from examining the card’s artwork (TCG)
Moonseed Poison potion
ingredients: unknown, but may contain moonseed
Exact effect unknown, but presumably poisonous
The TCG card artwork shows a transparent flask shaped like a glowing crescent moon, with a stand built in at the bottom of the arc (TCG).
Muffling Draught potion
ingredients: unknown
Exact effect unknown, but presumably effects the target’s ability to speak – may only require that the fumes be inhaled rather than that the potion necessarily be drunk
The statement of the potion’s effects comes from examining the card’s artwork and stated effects – that it blocks the player’s opponent from using Actions to play Spell cards for a turn (TCG)
Star Grass Salve potion
ingredients: unknown, but may contain star grass
Healing
The TCG card artwork shows a container shaped like a five-pointed star containing a greenish substance (TCG).
Also known as colicroot, star grass was once used as a medicinal herb to treat colic (AHD)