Is Ovinomancer legal in Standard, Modern, and Commander?

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

What type of card is Ovinomancer?

Ovinomancer is a Creature — Human Wizard. Its oracle text reads: "When Ovinomancer enters, sacrifice it unless you return three basic lands you control to their owner's hand.{T}, Return Ovinomancer to its owner's hand: Destroy target creature. It can't be regenerated. That creature's controller creates a 0/1 green Sheep creature token."

Ovinomancer

Creature — Human Wizard

When Ovinomancer enters, sacrifice it unless you return three basic lands you control to their owner's hand.<br>, Return Ovinomancer to its owner's hand: Destroy target creature. It can't be regenerated. That creature's controller creates a 0/1 green Sheep creature token.