Diagram: Novigrad longsword

These diagrams can be purchased from a number of craftsmen, including:
 * the Blacksmith in Blackbough
 * the Blacksmith in Lindenvale
 * the Blacksmith in Oreton
 * the Blacksmith in Fayrlund
 * the Smith in Fyresdal
 * the Smith in Kaer Muire
 * the Blacksmith in Svorlag
 * the Blacksmith in Urialla Harbor
 * the Merchant at the Isolated Hut on Hindarsfjall