Is Smiting Helix legal in Standard, Modern, and Commander?

Smiting Helix is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Smiting Helix?

Smiting Helix is a Sorcery. Its oracle text reads: "Smiting Helix deals 3 damage to any target and you gain 3 life. Flashback {R}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.) *Malice is appropriate when vengeance is called for.*"