Is As Foretold legal in Standard, Modern, and Commander?

As Foretold is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is As Foretold?

As Foretold is an Enchantment. Its oracle text reads: "At the beginning of your upkeep, put a time counter on this enchantment. Once each turn, you may pay {0} rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on this enchantment."

As Foretold

Enchantment

At the beginning of your upkeep, put a time counter on this enchantment.

Once each turn, you may pay rather than pay the mana cost for a spell you cast with mana value X or less, where X is the number of time counters on this enchantment.