Is Increasing Vengeance legal in Standard, Modern, and Commander?

Increasing Vengeance is legal in: Modern, Legacy, Vintage, Commander, Historic.

Increasing Vengeance

Q: What type of card is Increasing Vengeance?

Increasing Vengeance is an Instant. Its oracle text reads: "Copy target instant or sorcery spell you control. If this spell was cast from a graveyard, copy that spell twice instead. You may choose new targets for the copies. Flashback {3}{R}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)"

Instant

Copy target instant or sorcery spell you control. If this spell was cast from a graveyard, copy that spell twice instead. You may choose new targets for the copies.

Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)