The Witcher 3: The beast of White Orchard

Captain Peter Saar Gwynleve will tell Geralt about Yennefer's location if he kills the royal griffin. Geralt visits the hunter, Mislav, for more information and the herbalist, Tomira, for buckthorn. He plans to use buckthorn as bait to lure out the griffin. Before the fight, Vesemir gives Geralt a crossbow that may be useful.