This potion is legendary! The Potion of All Potential. A potion to realise all that is best in us."
-- Announcer at the Wizarding Schools Potions Championship (BoP)
Effect: helps bring out the best in a witch or wizard.
- preacher's porridge (plant)
- witch's ganglion (plant)
- Niffler's fancy (plant)
- Fermentadoria or Formatagoria (spellings differ on this ingredient, see "Notes" below).
Book of Potions Instructions:
- Add all four ingredients in any order you like.
- Wave your wand in any gesture you like.
References from the canon
Invented by a Hogwarts student during the Wizarding Schools Potions Championships and brewed in a golden cauldron. The creator was under the influence of Felix Felicis (which might explain the positive attributes of the potion) (BoP). Tested on a toad, the creature glowed with inner light, then attracted a lady-toad, which made the other contestants lined up to drink some.
potential = late 14c., "possible" (as opposed to actual), from Old French potenciel and directly from Latin potentia "power, might, force
The fourth ingredient of Potion of All Potential is difficult to hear when listening to the game and the word is not shown. Harry Potter Wikia lists it as "Formatagoria," but it could be "Fermentadoria" from the Portuguese word "Fermentador" meaning "brewer" or "bubbly," which certainly fits the subject and the character of Potioneer Zygmunt Budge. Knowing that JKR lived in Portugal at one time makes me think this is correct.