Triplicate Spirits [Magic 2015]

Set: Magic 2015 Type: Sorcery Rarity: Common Cost: {4}{W}{W} Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)Create three 1/1 white Spirit creature tokens with flying. (They can't be blocked except by creatures with flying or reach.)