The Lorekeeper's Tome

The Sand Wraith haunts the Desert of Glass, risen from the countless dead the desert has swallowed over the ages - the lost, the betrayed, the parched, whose bones the shifting glass-sands never gave up. It drifts the dunes and the buried ruins as a shimmer of heat and shadow, easily mistaken for a mirage until its killing cold is upon a traveller. There is an old bitterness to it, the resentment of those who died of thirst and abandonment in a beautiful, merciless place, and it spends that bitterness on any living thing that crosses its desolate haunt.