Zephyr Singer [March of the Machine]

Set: March of the Machine Type: Creature — Siren Pirate Rarity: Rare Cost: {2}{U}{U} 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.) Flying, vigilance When Zephyr Singer enters the battlefield, put a flying counter on each creature that convoked it.