Dovescape [Dissension]

Set: Dissension 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.