Zeus stood, panting, over the form of his father. "Well," he said, turning to his brothers and sisters. "That wasn't so hard, was it?"
"I beg to differ," Poseidon said, gingerly examining his shirt.
"You dare question me?" Zeus said, an edge to his voice.
"Of course not, Your Highness," Poseidon snapped.
"I hate to interrupt this warm and tearful brotherly reunion, but we should really be getting back home," Demeter said wearily, as if she had been expecting this.
"Oh... yeah," they said sheepishly.
"It is time for the king of the heavens to be appointed," the gods' mother, Rhea, told them all. Everyone took a step back except for Hades, Zeus and Poseidon. The rest of them knew how the "king of heavens" usually ended their reign.
"Very well," Hades said, speaking for the first time. "We must use an orderly and sophisticated way of deciding- "
"Rock paper scissors?" Poseidon suggested.
"You're on!" Zeus snarled. Hades only sighed.
"Rock, paper, scissors, shoot!" Zeus and Poseidon both chose paper. Hades chose rock.
"May eternal damnation rest upon this game!" Hades blurted. (This is the curse that will evolve into the popular phrase, "Damn it!")
"Stop copying me!" Zeus glared at Poseidon.
"I'm not copying anyone, least of all you!"
Second match: Poseidon loses after a streak of draws, which decides the youngest brother, Zeus, to be the king of the heavens, and lord of the sky.
Poseidon gets second choice, and immediately chooses the sea as his territory. this leaves Hades with the Underworld, and neither brother will cut him any slack. Defeated (because okay, yes, he sucks at rock paper scissors), he retreats to the Underworld.
Although most would agree that Hades got the short end of the stick, he still has a hell of a lot less to deal with than Zeus.
"Poor Hades" isn't really poor. In fact, he's filthy rich.