教室里传来一阵激烈的掌声

Because this kind of thing can only be found in the Black Water Realm, and it is shaped like dragon scales, hence the name. Even the most ordinary mortal dragon can be transformed into a divine dragon with a piece of Nirvana Dragon Scale Sand. The dragon with the lowest qualifications can use this to grow to an extremely high level. The four-clawed divine dragon uses the Nirvana Dragon Scale Sand to transform into a fifth claw. It is indeed as simple as eating and breathing....