This diagram will allow you to craft Większy kamień runiczny Perun. It can be purchased from the following merchants:
- Guślarz
- Keira Metz
- Kaznodzieja, an alchemist disguised as an Kult Wiecznego Ognia priest in Plac Elektorów
- Handlarz Scoia'tael in the forest outside Novigrad
- Gremista
- Kowal in Svorlag