Catastrophic dragon

Catastrophic dragons were a family of powerful and highly destructive draconic species.

Description
All catastrophic dragons had the basic draconic form: four legs, great wings, long necks and tails, etcetera. However, though living beings, they were composed of animated elemental matter.

Species of Catastrophic Dragons

 * Avalanche dragon
 * Blizzard dragon
 * Earthquake dragon
 * Tornado dragon
 * Typhoon dragon
 * Wildfire dragon
 * Volcanic dragon

History
In the legends surrounding the Dawn War, it was claimed that Io, creator and god of all dragons, was slain by a primordial. In the aftermath, most dragons chose to serve either Bahamut or Tiamat, but some lost faith in gods altogether and, believing that the primordials would win the war, turned to those powerful entities and offered them their service.

Seven of the primordials accepted the service of these dragons, and transformed- or perhaps corrupted- them into catastrophic dragons. They sowed great destruction during the war, and survived the primordials' downfall only to scatter across the planes.