Buy @ TCGplayer
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.
You can’t tap more creatures to convoke Zephyr Singer than is necessary to pay for the spell. In most cases, this means four creatures. However, if there are any additional costs to cast Zephyr Singer, you may use convoke to pay those additional costs as well.
