Is Watcher of Hours legal in Standard, Modern, and Commander?

Watcher of Hours is legal in: Legacy, Vintage, Commander.

What type of card is Watcher of Hours?

Watcher of Hours is a Creature — Sphinx. Its oracle text reads: "Flying, ward {3} Whenever you remove a time counter from this card while it's exiled, surveil 1. Suspend 6—{1}{U} (Rather than cast this card from your hand, you may pay {1}{U} and exile it with six time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)"

Watcher of Hours

Creature — Sphinx

Flying, ward

Whenever you remove a time counter from this card while it's exiled, surveil 1.

Suspend 6— (Rather than cast this card from your hand, you may pay and exile it with six time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, you may cast it without paying its mana cost. It has haste.)