Is Burnt Offering legal in Standard, Modern, and Commander?

Burnt Offering is legal in: Legacy, Vintage, Commander, Pauper.

What type of card is Burnt Offering?

Burnt Offering is an Instant. Its oracle text reads: "As an additional cost to cast this spell, sacrifice a creature.Add X mana in any combination of {B} and/or {R}, where X is the sacrificed creature's mana value."

Burnt Offering

Instant

As an additional cost to cast this spell, sacrifice a creature.<br>Add X mana in any combination of and/or , where X is the sacrificed creature's mana value.