Is Helvault legal in Standard, Modern, and Commander?

Helvault is legal in: Modern, Legacy, Vintage, Commander.

Helvault

Q: What type of card is Helvault?

Helvault is a Legendary Artifact. Its oracle text reads: "{1}, {T}: Exile target creature you control. {7}, {T}: Exile target creature you don't control. When Helvault is put into a graveyard from the battlefield, return all cards exiled with it to the battlefield under their owners' control."