Is Beacon Behemoth legal in Standard, Modern, and Commander?

Beacon Behemoth is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Beacon Behemoth

Q: What type of card is Beacon Behemoth?

Beacon Behemoth is a Creature — Beast. Its oracle text reads: "{1}: Target creature with power 5 or greater gains vigilance until end of turn. *When its smoky plumes light Naya's sky, every creature from the smallest pip fawn to the largest rannet heeds the warning.* Power/Toughness: 5/3"