Pryedhaeryi, simply known as the Borialosaurus, is the oldest member of the Sinestro Corps. He comes from an ancient race of creatures known as Borialosaurus that were once carnivorous sea animals on the planet Maltus billions of years ago. His kind was all but hunted out of existence after they attacked and killed dozens of Guardians.
Borialosaurus was one of the countless Sinestro Corps soldiers present on Qward when Kyle Rayner who was possessed by Ion at the time was forcefully taken to their location by a Yellow Power-Ring. He was seen restraining Rayner's arms behind his back while Sinestro]] instilled fear into him as part of his plan to separate the Ion entity from Kyle Rayner. Borialosaurus's current status is unknown.