| Category | Lexicon |
| Type | monster lore |
On the world of Bal-Kriav, the first harpies appeared in the coastal forests of Logor. Before their hideous transformation, they were sprites serving under a Covenant general named Silvanus. In the Demon Spawn War (8972 GE - 9493 GE), they were fighting in the Zythess region against the minions of a demon lord named Jurusalax. Some of those captured, especially the sprites, went through a blood transfusion with Jurusalax. For him it was an aphrodisiac, especially if the victim was magical in nature. Some survived these demoniac blood transfusions, becoming abominations of their former selves. The sprites that survived this, became Bal-Kriav's first harpies.
Harpies have changed from the time when they were first created. In the Demon Spawn War, they were used by Jurusalax as scouts and to harry the enemy. After centuries of breeding with natives, their appearances have changed from monstrous to more humanoid, and sometimes their torso and up, quite attractive. New blood gave them a humanoid appearance mixed with avian parts, but has not quelled all their demoniac heritage; most are still as chaotic and evil as any demon.