Call of the Nightwing [Guilds of Ravnica Guild Kit]

Set: Guilds of Ravnica Guild Kit Type: Sorcery Rarity: Uncommon Cost: {2}{U}{B} Create a 1/1 blue and black Horror creature token with flying.Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)