Darth Sadisticus was an apprentice of Darth Annihilus along with Darth Assassus. He was a member of the New Sith Triumvirate following the death of Darth Evilios during the Resurrection Wars. He was immensely powerful in the dark side of the Force, able to drain the connection that living beings had with the Force. In this way, he was the most powerful Sith Lord since Darth Nihilus, who lived almost 7,000 years earlier. He fought during the Resurrection Wars and in the Second War of Succession ninety years later. He was finally killed at the Battle of Thyferra during the War of Legacy.