Answer:
How dark and cold it was. Shadows and darkness intertwining. The cave filled with so many whispers and groans. And Hades, Lord of the Underworld, ruled it all. He was vile and stopped at nothing to get his way. His words came out in a raspy gasp, like dry leaves in the autumn. After so many years of being stuck with these slimy souls, he had become heartless and hostile.
It was on one particularly cold night when he came up with a plan. He didn't want to be stuck in the underworld any longer. He wanted to rule over the living. He wanted to feel the warmth of the sun -- not the cold air, stale, air that he had to endure for the past millennia. So he went to the Upperworld to strike a deal with Zeus. If he could get four hundred souls in one day, he would rule the Upperworld . . .
. . . and have Zeus rule the Underworld. They shook hands, sealing the deal. It was already noon, and there were only 265 souls. Then it came to be one in the afternoon with 323. The deal expires at midnight, and Hades was getting worried. So, with his guile character, he went up to the Upperworld once again. But this time, it was to gain more souls.
He did everything he could; scaring innocents dead of fright, provoking war among other countries. He was gaining more and more spirits by the second. Yet, they were still not enough. Hades needed one more . . . just one more soul. Then he would finally be free of this terrible responsibility.