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

Helm of Awakening is legal in: Legacy, Vintage, Commander.

What type of card is Helm of Awakening?

Helm of Awakening is an Artifact. Its oracle text reads: "Spells cost {1} less to cast."

Artifact

Spells cost less to cast.

Set Visions

Rarity Uncommon

Artist Adam Rex

Artifact Commander Legacy Vintage