"It is a myth that Dark Jedi do not need control over one's self. In fact, the more self-control a Dark Jedi has, the more powerful they can be. If a Dark Sider can control his feeling of hatred, anger and fear he will be able to use the Dark Side of the Force more efficiently. With control over one's anger, that Dark Sider can choose when to be angry and to what degree that anger will be to, making his powers more dangerous. With control over hatred a Dark Jedi can choose who he hates and who he doesn't, and to what degree he dislikes people too. With this power he can easily defeat difficult enemies"

                                                                               ~The Sith Scroll of Control 

• Powers of the Dark Jedi:

Force Throw - A Dark Jedi can command the objects around him and use them as weapons to crush his opponents.

The Grip - The dark side chokes the life from all living things, with this power you can immobilize your opponent and strike him down with little resistance.

Lightning Bolts - No one will underestimate the power of the dark side once its lightning surges through their body.

Destruction  - Just as creation is the nature of the light side, destruction is the nature of the dark side, use your hate to bring forth this awesome power of the dark side.

Deadly Sight  - This power only comes to you if you totally with the dark side, with this power you lose the neutral jedi powers such as the force jump, seeing, speed and pull.