He was king of the underworld in greek mythology
hades power is to rule the underworld and he has it as his own rule
Hades has the power to rule the Underworld and also request animals, including humans, to be killed.
Hades was a Greek god, And the Lord of the Underworld.
Hades is the God of the dead, the Underworld, and riches.
With Hades rose also Zeus and Poseidon, when they overtook the Titans.
the gods got their power from the love of the people whereas hades got his power from the fear the people had of the gods. So if the people feared the gods to much then he would over power the other gods. He also had sole control over the kraken. i hope this helps
Hades had a "cap of invisibility." The Helm of Hades made the wearer invisible to both gods and mortals.
Hades and all other gods get their power from prayer from mortals on earth
Zeus originally was the one to have given Hades his power to rule the Underworld. Some say it was a punishment, some say Hades really wanted to take up the Underworld. Also, many have told Hades trying to take over the sky and destroy Zeus.
no , he thought they had more power
I'm not sure if you mean this "symbol" but it has the power to make anyone who wears it invisible. The symbol is a gold helmet
The idea of Hades, and the place of "Hades" as the Underworld, is in Greek myth, which is much older then Christianity.So, if such beings exist, Hades would be older.