Radiant Pegasus

A notable breed of Pegasus, Radiant Pegasi are most commonly found upon the sunlit plateaus of Arabyan mountains. They absorb the sun's heat, transmuting it into the burning light that flows over their skin like ripples of brightest flame. When threatened, a radiant pegasus can discharge this magic at its attackers in a searing and crackling flash.

Source

 * Storm of Magic (supplement)
 * pg. 96