Is Torgaar, Famine Incarnate legal in Standard, Modern, and Commander?

Torgaar, Famine Incarnate is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Torgaar, Famine Incarnate?

Torgaar, Famine Incarnate is a Legendary Creature — Avatar. Its oracle text reads: "As an additional cost to cast this spell, you may sacrifice any number of creatures. This spell costs {2} less to cast for each creature sacrificed this way. When Torgaar enters, up to one target player's life total becomes half their starting life total, rounded down. Power/Toughness: 7/6"

Torgaar, Famine Incarnate

Legendary Creature — Avatar

As an additional cost to cast this spell, you may sacrifice any number of creatures. This spell costs less to cast for each creature sacrificed this way.