The Dark Lords of the Sith are the most terrifying beings in the Star Wars galaxy. They are masters of lightsaber combat and wield deadly Force abilities unlike any others. The fallen Jedi, Darth Vader, is thought by many to be the worst of their kind, but there was one Sith whose power eclipsed even that of Darth Vader: the Dark Lord, artist, architect and apparition Darth Momin.
Source：https://www.cbr.com/star-wars-darth-vader-sith-lord-deadly/
