The Mandate of the Heralds was to spread the light of Heaven to every corner of Creation and orchestrate the efforts of the entire Celestial Host in shaping God's Grand Design. Central to their duties was the Lore of the Celestials, comprising the knowledge of harnessing Heaven's will (and later, mortal Faith) to locate, inform and support the efforts of other celestials. No less important was the Lore of Flame, granting the Heralds mastery of the primal, purifying fire of creation, and a terrible weapon to wield against their foes. The Lore of Radiance, encompassing the secrets of inspiration and leadership, was not originally bequeathed to the Heralds, but that evolved among the Devils during the Age of Wrath as these noble leaders and champions refined the power to inspire and command the mortal allies of the fallen.