Depending on your approach the answer varies.
From a Theistic approach it will probably involve convenience finding it's way into your life. Those who wrong will reap pain. That which you desire will become yours. All by some supernatural force.
From a non-Theistic approach, it would be having a will strong enough to enforce change.
You could say they are stronger... and that is their power.
They become more successful and work harder because they understand that they cannot rely on anyone or anything else other than themselves.
In the U.S., due to our principles on freedom of speech and information, there are no restrictions on buying a satanic bible (with possible exception of obscure local and state laws.) Actually, the satanic bible is not particularly interesting. It has no special powers, and laws restricting its sale would only draw more attention to a mediocre product.
No they not Satanic
No, the Death Bat is not satanic. It is often mistaken as satanic by people, mostly Christians, but it is not.
No Dethklok is not Satanic.
No, they are not Satanic.
No. not satanic!
Nope, they aren't satanic.
No, why would you want to he doesn't come back until Anti-Christ comes on earth
NOOOOOO they aren't satanic
The highest satanic holiday actually.
The Maltese cross is not satanic.
No, a symmetrical scar is not satanic.