Leave the dragon be for now and head to the tower to the west called “Ranni’s Rise.” Go to the top of the tower and start Ranni the Witch’s questline (The Hidden Treasure of Nokron) by speaking to her. If you have been progressing through Rogier’s questline, make sure to ta...
The Darkmoon Greatsword can be found underneath the Cathedral of Manus Celes after giving Ranni the Dark Moon Ring in her questline. Conversely, the Scepter can be acquired from Enia at the Roundtable Hold after you give her Remembrance of the Full Moon Queen. ...