This diagram can be purchased from most armorers, including:
- Płatnerz in Wieś Podgaje
- Fergus Graem
- Willi
- Yoana
- Guślarz
- Keira Metz
- Alchemik at the Krematorium
- Handlarz Scoia'tael in the forest outside the city of Novigrad
- Handlarz in the red cap outside the Obóz nilfgaardzkiej armii "Środek"
- Gremista
- Zaklinacz słów