Is Steadfast Sentinel legal in Standard, Modern, and Commander?

Steadfast Sentinel is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper.

Steadfast Sentinel

Q: What type of card is Steadfast Sentinel?

Steadfast Sentinel is a Creature — Human Cleric. Its oracle text reads: "Vigilance Eternalize {4}{W}{W} ({4}{W}{W}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Human Cleric with no mana cost. Eternalize only as a sorcery.) Power/Toughness: 2/3"

Creature — Human Cleric

Vigilance

Eternalize (, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Human Cleric with no mana cost. Eternalize only as a sorcery.)