Shadowdragons are peculiar beings, being only partially material. They are basically dragonshaped shadows with some substance. Substance enough to manifest claws and teeth if need be.
They have a rather creepy breathweapon that sucks the lifeforce out of the victim, feeding the dragon.
Small as dragons go, shadowdragons are exceptionally clever, fast and most adult specimens pack a serious array om magic as well.
Their semi-material nature also gives them the ability to get in where most other beings their size wouldn't.
Zhaunil has a ShadowDragon pup named Black, and we have been visited by it's mother, named Darkness by Zhe'raen.