Darth Sicarius

Journey To succeed.
As in Cade's life, Cade became Sith. He was granted with every rank, including Sith Lord. His Darth name was Sicarius, the Lord of Anger. He proclaimed the Lord of Anger, and he became one. As his life and progress progressed, he became Dark Lord of the Sith.

The Challenge.
In the ways of the Sith, you must challenge the Dark Lord of the Sith to become that rank. He did so, and succeded. He faced the Dark Lord, and won.