Shadow Magic was an obscure but powerful form of magic, first seen in Shadowkey. Azra Nightwielder harnessed this form of magic and discovered that shadows are not just the absence of light, but reflections of possible worlds, created by forces in conflict. Shadows can be created through simple means, such as light hitting a rock, or nations at war.

Shadow Magic involves the manipulation of shadows of those casting it. Their power rivals even that of the Elder Scrolls, as they can change past. present and future through manipulation of the shadow. It seems that Shadow magic feeds of conflict itself. During large conflicts such as wars, the shadow grows larger, and could produce a magical creature, known as the Umbra'Keth, or Shaodw of Conflict. This power could also be concentrated in certain creatures. Alduin, who appeared during the Skyrim Civil War, grew stronger through every soul sent to Sovngarde, devouring them to replenish his power.