Is Chant of Vitu-Ghazi legal in Standard, Modern, and Commander?

Chant of Vitu-Ghazi is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Chant of Vitu-Ghazi?

Chant of Vitu-Ghazi is an Instant. Its oracle text reads: "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."