C642 It Was Easy to Fulfill the Dream Babarthus Never Had

"Air sac! Deep into the bones!"

"This is called vascular transformation!"

"Feathers are not the privilege of birds. They are not even the privilege of dinosaurs. However, they should not be just boasting. They should not only become feathers that are focused on keeping them warm. They should become feathers!"

Ever since the existence of feathers similar to those found on the Pterosauria