Smoky and milky potions
A smoky potion is one of the randomly-generated colors of potion; it can be any type. However, it is noteworthy because it has a chance of summoning a djinni upon quaffing.
Quaffing a smoky potion has a 1/(13 + 2*djinn created in the game) of releasing the djinni.[1] This djinni may be peaceful, may be hostile, or may grant you a wish. Blessed smoky potions have a 4/5 chance of granting a wish, uncursed potions have a 1/5 chance, and cursed potions have a 1/20 chance.[2]
Because of this, it is worth blessing and quaffing all smoky potions, even if they are an otherwise useless or harmful type. In some cases, precautions must be taken; for example, if smoky potions are invisibility, you will need a way to deal with the permanent invisibility intrinsic.
