Question: who is the lord of the sith?
Answer: Darth Sidious, publicly known as Sheev Palpatine from Naboo, was the reigning Dark Lord of the Sith during the last years of the Republic and the rise of the Galactic Empire. Darth Vader also assumed the mantle after becoming Sidious' apprentice, and was the last Sith Lord in the thousand-year lineage of Darth Bane.