Is Eyes of the Watcher legal in Standard, Modern, and Commander?

Eyes of the Watcher is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Eyes of the Watcher?

Eyes of the Watcher is an Enchantment. Its oracle text reads: "Whenever you cast an instant or sorcery spell, you may pay {1}. If you do, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)"

Eyes of the Watcher

Enchantment

Whenever you cast an instant or sorcery spell, you may pay . If you do, scry 2. (Look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)