I got inspiration from one of the threads from DragCave forums: What dragon would you be? (Thread: http://forums.dragcave.net/index.php?showtopic=106252) and this was my post in that thread (post: http://forums.dragcave.net/index.php?showtopic=106252&view=findpost&p=5473370). I also got permission from the spriters of the two dragons to post a picture. The reason I left the main body color white is that I did not have a light green marker, and the black marker would have drowned out the dark green details. The Green Nebula's coloring is a black dragon with lighter green/white spots, space dust, and a couple of galaxies. Im a terrible artist, but hopefully you could make out a spiral galaxy at the base of the tail and a pinwheel galaxy on the "midpoint" of the tail. This mixture of the dragons have led to a creation that this type only appears at nighttime due to the Nebula's preference for nighttime and provides pleasant nighttime dreams to every living thing that he watches over, which comes from the Daydream side.
This picture is mine, and the design base of the male Daydream body/pose belong to Lythiaren, a spriter of DragCave, and the looks/coloration base of the Green Nebula belongs to Sif and skinst, both DragCave spriters. Credit belongs to them. This is only a fanart piece, and should not be used for any other purposes.