Is Dromar, the Banisher legal in Standard, Modern, and Commander?

Dromar, the Banisher is legal in: Legacy, Vintage, Commander.

What type of card is Dromar, the Banisher?

Dromar, the Banisher is a Legendary Creature — Dragon. Its oracle text reads: "Flying Whenever Dromar deals combat damage to a player, you may pay {2}{U}. If you do, choose a color, then return all creatures of that color to their owners' hands. Power/Toughness: 6/6"

Dromar, the Banisher

Legendary Creature — Dragon

Flying

Whenever Dromar deals combat damage to a player, you may pay . If you do, choose a color, then return all creatures of that color to their owners' hands.