Is Cacophony Unleashed legal in Standard, Modern, and Commander?

Cacophony Unleashed is legal in: Legacy, Vintage, Commander.

Cacophony Unleashed

Q: What type of card is Cacophony Unleashed?

Cacophony Unleashed is an Enchantment. Its oracle text reads: "When this enchantment enters, if you cast it, destroy all nonenchantment creatures. Whenever this enchantment or another enchantment you control enters, until end of turn, this enchantment becomes a legendary 6/6 Nightmare God creature with menace and deathtouch. It's still an enchantment."

Enchantment

When this enchantment enters, if you cast it, destroy all nonenchantment creatures.

Whenever this enchantment or another enchantment you control enters, until end of turn, this enchantment becomes a legendary 6/6 Nightmare God creature with menace and deathtouch. It's still an enchantment.

Set Commander Masters

Rarity Rare

Mana Value 7

Artist Deruchenko Alexander

Collector # 730

Scryfall