Is Lunk Errant legal in Standard, Modern, and Commander?

Lunk Errant is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Lunk Errant

Q: What type of card is Lunk Errant?

Lunk Errant is a Creature — Giant Warrior. Its oracle text reads: "Whenever this creature attacks alone, it gets +1/+1 and gains trample until end of turn. *"One's plenty," observed the merrow. "Way too plenty," agreed the boggart.* Power/Toughness: 4/4"