This scroll contains the formula for Petri's Philter, a potion which augments the intensity of all Signs.
- Petri's Philter formula
- Petri's Philter: augments the intensity of all Signs.
- Formula: Petri's Philter
- Received from the Gravedigger at the same time as the key to the cemetery gate (Chapter II)
- A crate (or trunk) in the Fisstech lab in the Salamandra hideout in the sewers (Chapter III)
- Received from chief chemist in the Fisstech lab in the Salamandra hideout in the sewers if you entered with password (Chapter III)
- The Hermit in the Fields sells it for 500 (Chapter IV)
- Kalkstein sells it in Old Vizima (Chapter V)