Hypnos (Greek) Ύ π νος）， He is the sleeping god in ancient Greek mythology. He is the twin brother of the death god Tanatos, and his mother is the Night Goddess Nikus. The two brothers live together in the underworld. Whenever their mother causes the world to fall into darkness, he commands them to go to the earth to lure humans to sleep.
When he faced his ruthless brother, Sepunos had a more gentle personality, often giving him eternal sleep in times of death. As long as he uses his divine power to lure humans, he can make them fall asleep. And his hypnosis is something that neither humans nor gods can refuse. The wife of Sepunos is Pasithea.

Hippus and Parthia had three sons, who were the heads of all other dream gods (Oniros). They are Phobetor, who is in charge of the "Beast Pose Dream", Phantasus, who is in charge of the "Object Form Dream", and Morpheus, who is in charge of the "Human Pose Dream". These three individuals appear in the sleep of all things and can transform into human forms, animals, and inanimate objects, respectively.
Endymion, who was given eternal sleep by the great god Zeus, once obtained the ability to keep his eyes open from Seponos in order to forever gaze at his beloved moon goddess Selene. However, according to the Greek poem "Licymnius of Chios", it is believed that Hephonus fell in love with the young shepherd Endymion, which allowed him to open his eyes in sleep and appreciate the beauty of the young man.
During the Trojan War, Hera planned to hypnotize Zeus and secretly help the Greeks while he was asleep. Hera found Hippus and asked him to help hypnotize Zeus. At first, Xiupunos dared not help, fearing that Zeus would become angry. So Hera promised to marry Parthia to him. The so-called lust makes intelligence faint. After the incident, Zeus was so angry that he chased and killed Heponos everywhere, and even fiercely drove him from heaven into the underworld.
During the Trojan War, Zeus had Hippus send Oneiroi to dream to Agamemnon, the leader of the Greek coalition.
During the Trojan War, Heponos and his brother Danatus were responsible for burying Sarpedon, the son of Zeus and Europa, and bringing his body to the underworld without being invaded by mortals.

After the death of King Ceyx of Tars in a shipwreck, Hera once sent the Rainbow Goddess Iris to deliver a message to the sleeping god, asking his sons to dream for Ceyx's wife and inform her of her husband's death. [1]
After the romance between Selene, the goddess of the moon, and the beautiful boy Endymion was exposed, Zeus punished Endymion and caused him to fall into an eternal sleep. The one who executes this command is the sleeping god Hepunos. Enmidion's request for him to open his eyes and sleep, so that even if he were asleep, he could still see Selena, was granted.
However, some versions also say that it was the sleeping god who fell in love with this beautiful young man himself. In order to always see his beautiful eyes, the god of sleep gave him the ability to open his eyes and sleep.
PS: His deeds can be found in the following books
Aeneas, Volume 6, Ileon, Volume 14, Metamorphosis, Volume 11, and Theology.

Hypnus (Greek: Ύ π νος， The Roman name Somonos is the sleeping god residing in hell in Greek mythology, regarded as a symbol of personification of 'sleep'. His twin brother is the god of death, Danatus（ θάνατος）， And the Night Goddess Nick（ Νύξ） It's their mother. Nicks was the sister of the earth god Gaia, who was the grandmother and grandmother of Zeus. His palace is a dark cave on the north coast of the Black Sea that sunlight will never reach; At the bottom of the cave, a tributary of the Forgotten River (Lette River) flows. A large number of poppies and the hypnotic plant Valeriana officinalis were planted in front of the palace gate. The ancient Greeks referred to Valeriana officinalis as the "divine grass" and "sleeping god grass". The word 'Hypnosis' in English comes from the source of the word' Hypnosis'.

The sleeping god Heponos, a winged deity, falls asleep when he strikes a magic wand or flaps his wings. His power is greater than that of the gods, and even Zeus cannot escape his magic. In some works of art, Sepunos is depicted as a naked adult man, sometimes with a beard and wings on the back. His other image is sleeping peacefully on a feather bed, covered in black curtains. The god of dreams, Oneilos, served as his attendant to block all external disturbances for him. In Sparta, Sepunos is always on par with 'death'.
Xiupunos is the younger brother of the twins (according to one version, Xiupunos is the older brother), a man with long wings and sometimes wearing a helmet. He is believed to always imitate his brother Tanatos, the god of death (the ancient Greeks believed that the state of 'sleep' was very similar to a brief death).
However, unlike his older brother, the god of sleep, Heponos, is loved by mortals because sleep helps alleviate the stress and pain of life. Moreover, the power of the sleeping god is not only effective for mortals, but also for gods.