Is Cloak of Confusion legal in Standard, Modern, and Commander?

Cloak of Confusion is legal in: Legacy, Vintage, Commander, Pauper.

Cloak of Confusion

Q: What type of card is Cloak of Confusion?

Cloak of Confusion is an Enchantment — Aura. Its oracle text reads: "Enchant creature you controlWhenever enchanted creature attacks and isn't blocked, you may have it assign no combat damage this turn. If you do, defending player discards a card at random."

Enchantment — Aura

Enchant creature you control<br>Whenever enchanted creature attacks and isn't blocked, you may have it assign no combat damage this turn. If you do, defending player discards a card at random.

Set Ice Age

Rarity Common

Artist Margaret Organ-Kean