Is Boneyard Scourge legal in Standard, Modern, and Commander?

Boneyard Scourge is legal in: Legacy, Vintage, Commander.

Boneyard Scourge

Q: What type of card is Boneyard Scourge?

Boneyard Scourge is a Creature — Zombie Dragon. Its oracle text reads: "Flying Whenever a Dragon you control dies while this card is in your graveyard, you may pay {1}{B}. If you do, return this card from your graveyard to the battlefield."

Creature — Zombie Dragon

Flying

Whenever a Dragon you control dies while this card is in your graveyard, you may pay . If you do, return this card from your graveyard to the battlefield.