Poseidon is more powerful than Hades.

Whether or not any of the Greek Gods are real is irrelevant in discussing their relative strengths and weaknesses. This is a discussion of how they would perform if they were real. Besides, how do you know that they don't exist? Do you have any proof? By the way, why do you mention they aren't real if it isn't the point? In response to his age, it is acknowledged that that he is the oldest of the Greek Pantheon. However age does not equate power. If that were true, then Zeus, the youngest of the brothers, could not have defeated his father Cronus, who had swallowed both Poseidon and Hades as infants. Cronus was far older than his youngest son and therefore more developed as well. If Zeus could defeat Cronus, a being far older than him, then your logic is faulty. You assume that gods gain strength as they age. Why? What about age gives him an advantage? Wisdom? Does he become physically stronger? Does he get handy gadgets? Hades and Poseidon are both sons of Cronus, who swallowed his male children after they are born. What happened to them inside his stomach is unknowable. They could have developed normally, been deformed, or enter some sort of stasis. Both were released from Cronus as the some time. Since neither pro nor con can not prove that Hades had any discernible advantage in being technically older, we should disregard age as a metric of power. In addition, I believe that most mythology agrees that Hades was tricked into accepting the underworld as his domain, believing that he would have ruled both the land on top as well as the underworld. That shows that Hades is less clever than Zeus, at least, and possibly Poseidon, who wasn't tricked into accepting his domain. Incidentally, I was kind of hoping for some scenario, although I realize it must necessarily be subjective. MY argument- Poseidon, as god of earthquakes, destroys Hades domain through his earth shaking strength, crushing Hades in the process. Hades, being a wily old goat (get it? a reference to cloven hooves? Hades is Satan people!!!), had put on his cap of invisibility as soon as he heard of Poseidon's challenge. He got out of dodge, realizing the first thing Poseidon would do is bring the underworld down. He spotted Poseidon standing at the gates of Tartarus, breathing heavily from the effort put forth in destroying the underworld. He crept closer to Poseidon. Unfortunately, Hades isn't as clever as he thought. When Poseidon destroyed the underworld, quite a bit of dust was blown up. Although Hades was physically invisible, he still displaced matter. Poseidon knew his first attempt might fail, and kept a watchful eye about him. He saw the displaced dust moving steadily around him in order to get behind him. Poseidon waited for Hades to creep in place in order to strike him. Suddenly he turned, his trident appearing in his hands and leaving it as quickly. The trident flew through the air, breaking the sound barrier and nearing the speed of light. Hades didn't even have time to blink before the trident struck him dead center. Poseidon wins!!!!! In addition to this scenario I will list advantages that Poseidon has. Poseidon- God of Earthquakes, horses, and the sea In some mythology, he was not swallowed by Cronus. This means that he might have a slight edge on Hades (or maybe not. Who can say how this would have affected him.). Could shapeshift Possesses a Trident forged by the Cyclopes as a symbol of his power. Hades- God of the Underworld and the dead. God of wealth (as in gold and precious stones which are mined) Mortals who enter his realm generally cannot leave (does not affect Poseidon, as he is a God) Possesses a cap of invisibility, also known as the Helm of Darkness, as a symbol of his power Had a powerful fork and staff which could raise the dead Could control fire Worst case scenario, Poseidon maintains a shield of water about him. Imagine a hurricane of water. No fire could reach him. Since the shield is 360 degrees, Hades couldn't strike a physical blow. Sources: Hades/Poseidon's Wikipedia pages. http://www.ga.k12.pa.us... http://ancienthistory.about.com... http://answers.yourdictionary.com...