In Mage: The Awakening terminology, a Reaper is an Awakened who has developed magic that relies on soul theft and abuse, usually via Legacy. In many ways, a soul, even a Sleeper one, is an untapped font of extremely powerful magic of all ten Arcana, making its use an extremely juicy temptation for the power hungry and ruthless. Needless to say, Reapers are almost as despised as the Scelesti, and are hunted wherever found.