Is Helm of Kaldra legal in Standard, Modern, and Commander?

Helm of Kaldra is legal in: Modern, Legacy, Vintage, Commander.

Helm of Kaldra

Q: What type of card is Helm of Kaldra?

Helm of Kaldra is a Legendary Artifact — Equipment. Its oracle text reads: "Equipped creature has first strike, trample, and haste. {1}: If you control Equipment named Helm of Kaldra, Sword of Kaldra, and Shield of Kaldra, create Kaldra, a legendary 4/4 colorless Avatar creature token. Attach those Equipment to it. Equip {2}"

Legendary Artifact — Equipment

Equipped creature has first strike, trample, and haste.

: If you control Equipment named Helm of Kaldra, Sword of Kaldra, and Shield of Kaldra, create Kaldra, a legendary 4/4 colorless Avatar creature token. Attach those Equipment to it.