Sun blade

A sun blade was a magic longsword whose blade consisted of pure sunlight.

Description
When deactivated, a sun blade appeared to be a longsword hilt with no blade. A creature attuned to it could cause a bright radiant blade to appear or disappear by force of will. The light emitted by the blade could be adjusted by the wielder, and was capable of illuminating a radius between 20 feet (6.1 meters) and 60 feet (18 meters).

Powers
Sun blades were extremely light and could be wielded with the same finesse that shortswords allowed. The light emitted by the blade was actual sunlight and its radiant energy was particularly damaging to undead.

Notable Sun Blades

 * Dawnbringer, a sentient sun blade lost in the Underdark.

Appearances

 * Curse of Strahd
 * Out of the Abyss