Is Second Breakfast legal in Standard, Modern, and Commander?

Second Breakfast is legal in: Modern, Legacy, Vintage, Commander, Pauper, Historic.

Second Breakfast

Q: What type of card is Second Breakfast?

Second Breakfast is an Instant. Its oracle text reads: "Up to two target creatures each get +2/+1 until end of turn. Create a Food token. (It's an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life.")"

Instant

Up to two target creatures each get +2/+1 until end of turn. Create a Food token. (It's an artifact with ", , Sacrifice this token: You gain 3 life.")