Is Herald of Hadar legal in Standard, Modern, and Commander?

Herald of Hadar is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Herald of Hadar

Q: What type of card is Herald of Hadar?

Herald of Hadar is a Creature — Human Warlock. Its oracle text reads: "Circle of Death — {5}{B}: Roll a d20. 1—9 | Each opponent loses 2 life. 10—19 | Each opponent loses 2 life and you gain 2 life. 20 | Each opponent loses 2 life and you gain 2 life. Create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this token: Add one mana of any color.") Power/Toughness: 4/4"

Creature — Human Warlock

Circle of Death — : Roll a d20.

1—9 | Each opponent loses 2 life.

10—19 | Each opponent loses 2 life and you gain 2 life.

20 | Each opponent loses 2 life and you gain 2 life. Create two Treasure tokens. (They're artifacts with ", Sacrifice this token: Add one mana of any color.")