사괘, or "Four Symbols," refers to a set of four mythological creatures in East Asian culture, particularly in Chinese and Korean traditions. These creatures are the Azure Dragon, White Tiger, Red Phoenix, and Black Tortoise. Each symbol represents a cardinal direction and is associated with specific elements, seasons, and virtues. In Korean culture, 사괘 is often used in various contexts, including art, literature, and traditional practices. The creatures are believed to embody protective qualities and are frequently depicted in Korean folklore and mythology, symbolizing harmony and balance in nature and human life.