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

Herald of Torment is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Herald of Torment

Q: What type of card is Herald of Torment?

Herald of Torment is an Enchantment Creature — Demon. Its oracle text reads: "Bestow {3}{B}{B} (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.) Flying At the beginning of your upkeep, you lose 1 life. Enchanted creature gets +3/+3 and has flying. Power/Toughness: 3/3"

Enchantment Creature — Demon

Bestow (If you cast this card for its bestow cost, it's an Aura spell with enchant creature. It becomes a creature again if it's not attached to a creature.)