Is Dawnglow Infusion legal in Standard, Modern, and Commander?

Dawnglow Infusion is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Dawnglow Infusion?

Dawnglow Infusion is a Sorcery. Its oracle text reads: "You gain X life if {G} was spent to cast this spell and X life if {W} was spent to cast this spell. (Do both if {G}{W} was spent.) *Dawnglove bloom is a potent nostrum, but the dawnglow brewed from its sap is nothing less than life itself.*"