Cover of Darkness [Assassin's Creed]

Set: Assassin's Creed Type: Enchantment Rarity: Rare Cost: {1}{B} As Cover of Darkness enters the battlefield, choose a creature type.Creatures of the chosen type have fear. (They can't be blocked except by artifact creatures and/or black creatures.) An Assassin has no weapon as deadly and no ally as dependable as the shroud of night.