Nightveil Specter is a rare Creature — Specter card from Gatecrash (GTC), collector number 222. Current market price: $0.53 (foil $1.51), TCGplayer market prices via Scryfall.
Flying Whenever this creature deals combat damage to a player, that player exiles the top card of their library. You may play lands and cast spells from among cards exiled with this creature.