Its been centuries after the great Hercules defeated Hades;god of the Underworld.
Later on, all three of them discussed their plan for the revenge for Hercules. And to prove that Hades was more powerful than him.
The "oh so great Herucles" has made children. I see them on earth with amusement.
Yes sire. I have quite a plan of i may say so ourselves.
And with great power, and great force, Hades created the first EVER snake. But of course, it wasn't called a snake back then. But they all agreed on naming the animal Thanatos. Who would become a human by day, but turn back into a snake by night. And with anger, the slim snake would turn into a horrible monster.
When the snake was prepared, Hades launched the plan and sent his minion to earth to complete the plan: Destroy Hercules's kids, causing great sorrow for him. And to make the world see how "great and powerful" Hades is.
As soon as he arrived, Thanatos quickly started walking towards the village seeking the gods or demi-gods of the great Hercules.
Thanatos had later found one of Hercules's children named Adonis and Astra in the village.