Is Heretic's Punishment legal in Standard, Modern, and Commander?

Heretic's Punishment is legal in: Modern, Legacy, Vintage, Commander.

Heretic's Punishment

Q: What type of card is Heretic's Punishment?

Heretic's Punishment is an Enchantment. Its oracle text reads: "{3}{R}: Choose any target, then mill three cards. This enchantment deals damage to that permanent or player equal to the greatest mana value among the milled cards."

Enchantment

: Choose any target, then mill three cards. This enchantment deals damage to that permanent or player equal to the greatest mana value among the milled cards.