Is Leviathan legal in Standard, Modern, and Commander?

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

Leviathan

Q: What type of card is Leviathan?

Leviathan is a Creature — Leviathan. Its oracle text reads: "TrampleLeviathan enters tapped and doesn't untap during your untap step.At the beginning of your upkeep, you may sacrifice two Islands. If you do, untap Leviathan.Leviathan can't attack unless you sacrifice two Islands. (This cost is paid as attackers are declared.)"

Creature — Leviathan

Trample<br>Leviathan enters tapped and doesn't untap during your untap step.<br>At the beginning of your upkeep, you may sacrifice two Islands. If you do, untap Leviathan.<br>Leviathan can't attack unless you sacrifice two Islands. (This cost is paid as attackers are declared.)

Set The Dark

Rarity Rare

Artist Mark Tedin