Is Tezzeret's Gatebreaker legal in Standard, Modern, and Commander?

Tezzeret's Gatebreaker is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Tezzeret's Gatebreaker

Q: What type of card is Tezzeret's Gatebreaker?

Tezzeret's Gatebreaker is an Artifact. Its oracle text reads: "When this artifact enters, look at the top five cards of your library. You may reveal a blue or artifact card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. {5}{U}, {T}, Sacrifice this artifact: Creatures you control can't be blocked this turn."

Artifact

When this artifact enters, look at the top five cards of your library. You may reveal a blue or artifact card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

, , Sacrifice this artifact: Creatures you control can't be blocked this turn.