So was moses just a priest of Akhenatan and was his name Osarseph?

It seems he was.

And as the high priests were trained in magical evocation he conjured up a bloodthirsty demon.

It has been said that he is the cause of the catastrophe we all face today.

Black magic. Blood sacrifices from the underworld of negative beings. Vampires,

It has also been said that some black magicians are the only ones who face eternal damnation.

Bullshit