Hadrian arrived in 4000 BC and let's just say he had to deal with certain annoying beings that called themselves gods, but the reality was they were just beings created by Nature.
These beings existed before 8000 BC, despite this, they're still subjected to Nature's balance, though to an ill-defined degree.
They have magic given from their godhood, they possess what Hadrian called god magic.This depends on their godhood like Vulcan the goddess of smithing can forge smithing and metalwork, making such objects seemingly indestructible by mortal or supernatural means.
Zeus or Jupiter can control lighting and storms,also stronger and older gods are able to cast, control, and remove curses.
They are almost invisible,like they possess a durability unlike any other and far exceeding supernatural beings and they possess a strength unlike any other and far exceeding supernatural beings.All of them are able to fly too.
They have Longevity or Immortality,which Hadrian was able to void because of his association with Death.Like some of them are capable of Temporal Manipulation like Chronos is the god of Time.But there are rules and consequences for using these powers.
Hadrian was okay with some of the pantheons, who found him to be intriguing. He even had a relationship with Hades, who is a woman and Hadrian called her Lynn she was cursed by her brother Jupiter because she felt pity for a mortal,who died because of the wars caused by her brother and She thought it was unfair and saw the poor souls lost to wander in the darkness forever. So she took pity on them. She found a mother and child who died for no reason, and she thought, since the gods had taken away their happiness, she should ferry them across into Peace. Since they colonized their world, she settled them in theirs. When her brother found out, he cursed her. If she was so interested in helping humans, he would force her to do it for all eternity, never to return home. Always reaching the shore, but never able to set foot there. Lynn has done this for the last 5,000 years, give or take.
But among them were annoying and this one person who tried to kill him because of his paranoia was Zeus or Jupiter.
But Jupiter learned quickly not to mess with Hadrian and so he was left alone,Greek or Roman Pantheon lived high atop one of the Caucasus Mountains, guarded behind a threshold that mortal men could not pass. The village at the base of the mountain was mortals who worshiped these gods.
Hadrian was looking at the Caucasus Mountains from distance and thought"It is ironic that these gods who thought themselves superior to mortals needed the mortal to survive."
Gods run on belief and are only as powerful as people's belief in them. This is both a great power and a diminishing weakness for them,since with time these beliefs would start diminishing and their powers would disappear.
Hadrian felt a presence behind him,as he smiled and asked"So you are in the mortal realm again,Lynn?"
Lynn she had blonde hair and brown eyes,she was beautiful women.Hadrian was able to remove her curse,thus making her able to come to the human realm whenever she pleased.But she still liked ferrying people to Peace.
But interesting happened which was Jupiter had son with a mortal and his name was Prometheus and this boy was trigger that started the whole supernatural world.