Is Glacier Godmaw legal in Standard, Modern, and Commander?

Glacier Godmaw is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Historic.

Glacier Godmaw

Q: What type of card is Glacier Godmaw?

Glacier Godmaw is a Creature — Leviathan. Its oracle text reads: "Trample When this creature enters, create a Lander token. (It's an artifact with "{2}, {T}, Sacrifice this token: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.") Landfall — Whenever a land you control enters, creatures you control get +1/+1 and gain vigilance and haste until end of turn. Power/Toughness: 6/6"

Creature — Leviathan

Trample

When this creature enters, create a Lander token. (It's an artifact with ", , Sacrifice this token: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.")