Is Vivien's Arkbow legal in Standard, Modern, and Commander?

Vivien's Arkbow is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Vivien's Arkbow

Q: What type of card is Vivien's Arkbow?

Vivien's Arkbow is a Legendary Artifact. Its oracle text reads: "{X}, {T}, Discard a card: Look at the top X cards of your library. You may put a creature card with mana value X or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order."

Legendary Artifact

, , Discard a card: Look at the top X cards of your library. You may put a creature card with mana value X or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order.