Wyvern

The Dragon is a titanic flying Creature of Grimm that is capable of spawning other Grimm.

Appearance
The Dragon is an enormous winged creature, with large red bat-like wings, a pair of legs and a tail. The red membrane of the wing is slightly translucent. It has rough black skin, with white bone-like spines along its body, including an external skull, ribcage and rows of dorsal spikes. It also has three bony spikes on its tail and large claws on its hind legs. Its skull has a pair of large prominent horns and six yellow-red eyes. Its jaw has teeth extending down along the creature's neck, beyond its skull, such that its entire neck also opens when it roars.

History
The beast was apparently laying dormant below a mountaintop near Vale for an unspecified period of time. During the massive Grimm invasion of Vale in "Battle of Beacon", amidst the chaos and destruction unfolding within the city, the Dragon awakens beneath the mountain and smashes its way out, causing the ground to tremble. The beast then takes to the air and heads towards Beacon Academy, spawning lesser Grimm in its wake.

Cinder Fall apparently foresaw the wakening of the Dragon, and tells Mercury Black to make sure that he films and broadcasts its arrival. Upon realizing the beast has awakened, Glynda Goodwitch softly murmurs in horror while Professor Ozpin reservedly watches its approach.

Abilities and Powers
Although it has yet to be seen in combat, it is clear that the Dragon is enormous and capable of flight despite its size. Uniquely, it has the ability to summon or spawn other Grimm: the creature exudes a black, incredibly viscous tar-like substance from the skin all over its body. When droplets of this substance impact the ground, lesser forms of Grimm spawn from the residue. Types of Grimm which have been seen spawned in this manner include Creeps, Beowolves and Ursai.

Trivia

 * Dragons are a mythical winged reptilian creature present in many cultures. However, as the Grimm Dragon has two legs, it would be considered a wyvern by some formalists.
 * The Dragon was designed by production/concept artist Erin Winn.