Because he's a god and gods have powers
Also because he needs powers to rule the Underworld
hades can turn invisible with his helm of darkness
He is the ruler of t
Hades befriends the other Gods/Goddesses and powers that be of the Underworld.
Anything he wishes within his powers
He is a god, he was born with them.
To turn into Darkness.
he created it with his powers
Helping hades
Hades and all other gods get their power from prayer from mortals on earth
You can get posideon, zeus, hades, grover, and medusa and I don't get part 2 of your question
Ruler of the Underworld and command of the dead, immortality.
He controlled the dead in the Underworld