Chant of Vitu-Ghazi | Magic: The Gathering
Formats Chant of Vitu-Ghazi is Legal in
Official Oracle Text for Chant of Vitu-Ghazi
Prevent all damage that would be dealt by creatures this turn. You gain life equal to the damage prevented this way.
Official Rulings for Chant of Vitu-Ghazi
2/1/2014 : Convoke allows you to tap creatures in lieu of paying mana as part of casting a spell. You first determine the total cost to cast the spell, including any additional or alternative costs, as normal. Then, for each colored mana in that total cost, you may tap an untapped creature of that color you control rather than pay that mana. Similarly, for each generic mana in that total cost, you may tap an untapped creature you control rather than pay that mana.