Lord of the Nazgûl is a rare Legendary Creature — Wraith Noble card from Tales of Middle-earth Commander (LTC), collector number 142. Current market price: $13.47, TCGplayer market prices via Scryfall.
Flying Wraiths you control have protection from Ring-bearers. Whenever you cast an instant or sorcery spell, create a 3/3 black Wraith creature token with menace. Then if you control nine or more Wraiths, Wraiths you control have base power and toughness 9/9 until end of turn.