In Persian mythology, a دیو (Demon) is often depicted as a malevolent spirit or creature that embodies chaos and evil. These beings are typically associated with darkness and are considered adversaries of the divine and good forces. They play a significant role in various tales, often representing obstacles that heroes must overcome. Demonology in Persian culture includes various types of دیو, each with unique characteristics and powers. They are frequently mentioned in ancient texts like the Avesta and Shahnameh, where they challenge the good spirits known as Yazatas. The concept of دیو reflects the struggle between good and evil in the world.