Spren are magical entities in the world of Roshar, a fictional setting created by author Brandon Sanderson. They are manifestations of natural phenomena, emotions, or concepts, often appearing as colorful, ethereal beings. Each type of spren corresponds to a specific aspect of the world, such as honor, fear, or wind. Spren play a crucial role in the magic system of The Stormlight Archive series. They can bond with humans, granting them unique powers and abilities. This bond is essential for the formation of Knights Radiant, a group of heroes who protect the world from various threats.