Dark Souls II SotFS [All Dark Quartz Rings locations]

This video shows how to obtain all Dark Quartz Rings in Dark Souls 2. The base ring could be purchased from Rosabeth of Melfia and increases dark defense in 50 points. The Dark Quartz Ring +1 is a drop when killing Duke Tseldora after the battle with Freja in Brightstone Cove Tseldora. This ring increases dark defense by 80. Dark Quartz Ring +2 is a possible drop from Leydia Witches who are located in the Undead Crypt. In the video I had no luck with the drop. It increases dark defense by 100. Finally, the Dark Quartz Ring +3 is located in Shulva (DLC Crown of the Sunken King). It increases dark defense in 150 points.