Is Fanatic of Rhonas legal in Standard, Modern, and Commander?

Fanatic of Rhonas is legal in: Modern, Legacy, Vintage, Commander, Historic.

What type of card is Fanatic of Rhonas?

Fanatic of Rhonas is a Creature — Snake Druid. Its oracle text reads: "{T}: Add {G}. Ferocious — {T}: Add {G}{G}{G}{G}. Activate only if you control a creature with power 4 or greater. Eternalize {2}{G}{G} ({2}{G}{G}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Snake Druid with no mana cost. Eternalize only as a sorcery.)"

Fanatic of Rhonas

Creature — Snake Druid

: Add .

Ferocious — : Add . Activate only if you control a creature with power 4 or greater.

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