Is Howl from Beyond legal in Standard, Modern, and Commander?

Howl from Beyond is legal in: Legacy, Vintage, Commander, Pauper.

What type of card is Howl from Beyond?

Howl from Beyond is an Instant. Its oracle text reads: "Target creature gets +X/+0 until end of turn."

Instant

Target creature gets +X/+0 until end of turn.

Set Limited Edition Alpha

Rarity Common

Artist Mark Poole

Instant Commander Pauper Legacy