Is Sundial of the Infinite legal in Standard, Modern, and Commander?

Sundial of the Infinite is legal in: Modern, Legacy, Vintage, Commander, Historic.

Sundial of the Infinite

Q: What type of card is Sundial of the Infinite?

Sundial of the Infinite is an Artifact. Its oracle text reads: "{1}, {T}: End the turn. Activate only during your turn. (Exile all spells and abilities from the stack. Discard down to your maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)"

Artifact

, : End the turn. Activate only during your turn. (Exile all spells and abilities from the stack. Discard down to your maximum hand size. Damage wears off, and "this turn" and "until end of turn" effects end.)