Mythological Apocalypse

Hundreds of millions of years before the birth of human civilization, the group of creatures that ruled this planet... A young man surrounded by a giant python, a giant tree that blocks the sky, a super civilization sinking to the bottom of the sea, a top predator whose recipes are spread throughout the biosphere... Why is there a world-destroying flood in the myths of all countries? Why did the super life form that could easily wipe out human beings die out overnight? Who is whispering in the darkness, who is responsible for saving, and who is planning everything in the layers of fog? "They never left, they just hid temporarily. As long as there is an opportunity, they will take off their noble silk gloves and join this war of power and benefit."