Lord Morrow stole the Dragonsbane Weapons from the Voraci forces during the time skip between the Original series and Solum. The weapons were used to purge all of the dragons in the land, likely including the Brass Dragon. He still possesses the weapons. When the party recall the stories of Lord Morrow, he went mad and after killing hundreds of dragons he simply disappeared, probably dying to one in the end. But there have always been sightings of him across the years, no proof but he may still be out there stalking dragons.