Manuscript page: Superior Petri's Philter

Manuscript page: Superior Petri's Philter is an alchemy formula in that is needed to craft Superior Petri's Philter.
It's a possible spawn at a random diagram location starting at level 18, or purchased from the following merchants:
* Gremist at Gedyneith
* Yolar at Gedyneith
* Countess Mignole during Open Sesame! 
* All alchemists and herbalists in Toussaint, except Pinastri 
pl:Stronica z manuskryptu: Wyśmienity Filtr Petriego
ru:Рецепт: Отличное Зелье Петри
Category:The Witcher 3 alchemy formulae