A Shadow is a malevolent spirit created by the torture and sacrifice of a human. The vast bulk of Shadows are imprisoned on the Plain of Glittering Stone, permanently denying the proper use of the Plain to everyone, though a few paths remain open, warded by powerful magic. Although they range greatly in size and lethality, Shadows are united in their loathing of all life and relentlessly pursue its destruction, attacking at every opportunity. Shadows kill quickly and cause their victims incredible agony before they perish. Undeterred by normal barriers, Shadows are repelled only by light and by magic, which can be used to both control and destroy them.
Wizards able to control and direct Shadows are known as Shadowmasters.