Star Wars: 10 Most Powerful Dark Side Force Users

10. Savage Opress

The brother of the Dathomirian Sith Assassin, Darth Maul, Savage Opress proved himself to be an aggressive warrior - key in Maul's plans to seek revenge on Obi-Wan Kenobi, and later Palpatine.

Opress was shown to be a vicious opponent, even murdering his own brother in order to gain the trust of Asajj Ventress. Though initially not affiliated with the Sith, Opress was an invaluable acolyte, serving Ventress, Dooku, and eventually Maul. He was led by Mother Talzin to restore his brother, Maul, to strength, and was crucial in returning Maul to his former glory.

A powerful Dark-Side user in his own right, Opress challenged Maul in a duel to become the Master in their duo; although Maul bested him, Opress was still powerful enough to defeat and kill Jedi Master Adi Gallia.

Opress eventually met his demise at the hands of Darth Sidious, with Opress attempting to assist in Maul's assassination of the Dark Lord of the Sith.