Is Fiery Impulse legal in Standard, Modern, and Commander?

Fiery Impulse is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Fiery Impulse

Q: What type of card is Fiery Impulse?

Fiery Impulse is an Instant. Its oracle text reads: "Fiery Impulse deals 2 damage to target creature. Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, Fiery Impulse deals 3 damage instead. *"Well, this got out of hand."*"