Dwarven Ring of Druin's Folk

The Ring of Druin's Folk, also known as the Ring of Fury, had been given to Isin by disguised ambassadors of Sauron.Isin who initially did not knew the ring came from Sauron, passed it on to his heirs.The ring was believed to have been devoured by a Dragon who slew Isin's heir as he defended the gates of Nargubraz.