From Destinypedia, the Destiny wiki
When Daybreak is activated, a Dawnblade Warlock gains flaming wings that grant them flight, along with a flaming sword that can project blasts of Solar energy.
The Warlock Osiris used the Dawnblade subclass, activating the Daybreak super to battle Vex inside a simulation of the Vault of Glass within the Infinite Forest. Shortly after the onset of the Red War, The Guardian discovered the subclass in the European Dead Zone, when they used a Shard of the Traveler to recover their lost Light.
The Super shares the same name as the Daybreak Strikes of the Age of Triumph.
List of appearances