Dovescape [Ravnica Allegiance Guild Kit]

Set: Ravnica Allegiance Guild Kit Type: Enchantment Rarity: Rare Cost: {3}{W/U}{W/U}{W/U} ({W/U} can be paid with either {W} or {U}.)Whenever a player casts a noncreature spell, counter that spell. That player creates X 1/1 white and blue Bird creature tokens with flying, where X is the spell's mana value.