Is Priest of Fell Rites legal in Standard, Modern, and Commander?

Priest of Fell Rites is legal in: Modern, Legacy, Vintage, Commander, Historic.

What type of card is Priest of Fell Rites?

Priest of Fell Rites is a Creature — Human Warlock. Its oracle text reads: "{T}, Pay 3 life, Sacrifice this creature: Return target creature card from your graveyard to the battlefield. Activate only as a sorcery. Unearth {3}{W}{B} ({3}{W}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)"

Priest of Fell Rites

Creature — Human Warlock

, Pay 3 life, Sacrifice this creature: Return target creature card from your graveyard to the battlefield. Activate only as a sorcery.

Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)