Is Dune Diviner legal in Standard, Modern, and Commander?

Dune Diviner is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Dune Diviner

Q: What type of card is Dune Diviner?

Dune Diviner is a Creature — Snake Cleric. Its oracle text reads: "{1}, Tap an untapped Desert you control: You gain 1 life. *The desert had once been a place of endless horror. It was now the last refuge as the city of Naktamun fell.* Power/Toughness: 2/3"