Let's take that question apart for a minute to try to answer it.
"Are supernatural powers real?"
Yes!
There is no such thing as supernatural powers.
No, no real animal, object or person has "supernatural" powers.
Athena's supernatural powers are wisdom and battle strategy.
Some people say that supernatural powers do or don't exist. In actuality supernatural powers do exist. People like ghost hunters and priests who perform exorcists encounter supernatural powers or beings such as ghosts, demons, and angels. If you are part of Christianity or almost any other religion they speak of some god. In my case I am a Christian so I believe in God. I also believe in angels which are supernatural beings, as well as demons. So supernatural powers do exist, but I don't believe that you should mess with supernatural powers because they can be really dangerous.
Ah! Mere mortals thus we be...No supernatural powers for you... or for me.... Drat!
No, it should be "Spiritualists commune with supernatural powers."
No. Super Saiyans are not real, though it would be awesome if they were. They are a fictional type of humans with supernatural powers, first introduced in the popular cartoon DragonBall Z. There have been reports of people throughout the world who have experienced supernatural strength, but they do not possess magical powers like the ones Super Saiyans do.
The main characters of H2o had supernatural powers.
They can fly
Godly.
Supernatural powers are the works of fictional authors and do not exist.