Chant of Vitu-Ghazi is a uncommon Instant card from March of the Machine Commander (MOC), collector number 177. Current market price: $0.31, TCGplayer market prices via Scryfall.
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.) Prevent all damage that would be dealt by creatures this turn. You gain life equal to the damage prevented this way.