Ghostly Dancers is a rare Creature — Spirit card from Duskmourn: House of Horror Promos (PDSK), collector number 13p. Current market price: $0.37 (foil $0.47), TCGplayer market prices via Scryfall.
Flying When this creature enters, return an enchantment card from your graveyard to your hand or unlock a locked door of a Room you control. Eerie — Whenever an enchantment you control enters and whenever you fully unlock a Room, create a 3/1 white Spirit creature token with flying.