Is Thundercloud Elemental legal in Standard, Modern, and Commander?

Thundercloud Elemental is legal in: Legacy, Vintage, Commander.

What type of card is Thundercloud Elemental?

Thundercloud Elemental is a Creature — Elemental. Its oracle text reads: "Flying {3}{U}: Tap all creatures with toughness 2 or less. {3}{U}: All other creatures lose flying until end of turn. *Some days it's better to stay inside.* Power/Toughness: 3/4"