what are the dragons that the nazgul ride
Nazgûl They are also called the Fell Riders and the Black Wings (when they ride the fell beasts), as well as the Shadows, the Servants of Sauron, and the Nine Servants of the Lord of the Rings. The Orcs of the Tower of Cirith Ungol call them Shriekers.
Chinese dragon The early Chinese dragons can be depicted with two to five claws. Different countries that adopted the Chinese dragon have different preferences; in Mongolia and Korea, the four-clawed dragons are used, while in Japanese dragon three-clawed dragons are common.[31] By the Yuan dynasty, the five-clawed dragons became reserved for use by the emperor while the princes used four-clawed dragons.[4] The usage of the dragon motif was codified during the Yuan dynasty, and phoenixes and five-clawed two-horned dragons may not be used on the robes of officials and other objects such as plates and vessels.[4][32] It was further stipulated that for commoners, "it is forbidden to wear any cloth with patterns of Qilin, Male Fenghuang (Chinese phoenix), White rabbit, Lingzhi, Five-Toe Two-Horn Dragon, Eight Dragons, Nine Dragons, 'Ten thousand years', Fortune-longevity character and Golden Yellow etc."[33]