Revanan was a red dragon that lived during the Age of Fire.
He was defeated by the clutch Champion (a golden hatchling) and was close to death when the human Wrimere took care of him (his parents believed the red hatchling died).
Wrimere gave a name to Revanan, raised him, and brought him kidnapped females to start a line of dragons. Eventually Revanan was put against his own old parents, to conquer their caves. Revanan won, killing his parents, but was crippled.
It's unknown when and how Revanan died, however he's believed to have sired most of the first original dragons of the Dragon-riders.