Is A-Visions of Phyrexia legal in Standard, Modern, and Commander?

A-Visions of Phyrexia is legal in: Historic.

A-Visions of Phyrexia

Q: What type of card is A-Visions of Phyrexia?

A-Visions of Phyrexia is an Enchantment. Its oracle text reads: "At the beginning of your upkeep, exile the top two cards of your library. Until your next end step, you may play one of those cards. At the beginning of your end step, if you didn't play a card from exile this turn, create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")"

Enchantment

At the beginning of your upkeep, exile the top two cards of your library. Until your next end step, you may play one of those cards.

At the beginning of your end step, if you didn't play a card from exile this turn, create a tapped Powerstone token. (It's an artifact with ": Add . This mana can't be spent to cast a nonartifact spell.")