Darth Eternal

Darth Eternal was the master of Darth Malevolus. He had watched events in the Galaxy unfold ever since Palpatine had begun his training under Darth Plaeguis. He therefore witnessed the enitre life-span of the New Sith Triumvirate. He was eventually killed while in his hundreds of thousands years of age by Darth Malevolus, who wished to claim the title of Dark Lord for himself.