This diagram will allow you to craft Kamień runiczny Czernobóg. It can be purchased from the following merchants:
- Guślarz
- Keira Metz
- Kowal in Oxenfurt
- Kowal in Novigrad
- Alchemik at the Krematorium
- Kaznodzieja, an alchemist disguised as an Eternal Fire priest in Plac Elektorów
- Handlarz Scoia'tael in the forest outside Novigrad
- Kowal in Wieś Arinbjorn
- Kowal in Fyresdal
- Gremista
- Kowal in Svorlag