Sandman, also known as Dream or Morpheus, is a fictional character in the comic book series "The Sandman" by Neil Gaiman. In the series, it is revealed that he is one of the seven Endless, immortal beings who personify abstract concepts. Dream is the personification of dreams and stories, and he came into existence alongside his siblings at the beginning of the universe.
In the comic series, Sandman's origin story is revealed in the ninth issue, "Tales in the Sand." It is revealed that Dream was born from the union of the first sentient creatures in the universe, the cosmic entities known as Time and Night. He was then given the name "Morpheus" by his father, and was tasked with being the guardian of the Dreaming, a realm where all dreams and stories reside.
After being given the responsibility of being the guardian of the Dreaming, Dream gradually became more powerful and took on the role of its ruler. He is able to control and manipulate the realm, and its inhabitants, including the dreams of humans. However, his role as ruler is often challenged by other entities, leading to conflicts and power struggles.
As an Endless, Sandman possesses immense powers and abilities. He has the power to control and manipulate dreams, as well as the ability to enter and influence the dream worlds of others. He is also immortal and can shape-shift into different forms. Additionally, he has enhanced strength, speed, and durability, and is able to travel through time and space.
Sandman's appearance is often depicted as pale, with dark hair and eyes, and wearing a black cloak and a helmet with two horns. This appearance is symbolic of his role as the embodiment of dreams and stories, and his connection to the realm of the Dreaming. His pale skin represents the realm of dreams, which is often associated with darkness and the unknown. The horns on his helmet are also a nod to the Greek god of sleep, Hypnos, who is often depicted with horns.