Is Rootwater Mystic legal in Standard, Modern, and Commander?

Rootwater Mystic is legal in: Legacy, Vintage, Commander, Pauper.

Rootwater Mystic

Q: What type of card is Rootwater Mystic?

Rootwater Mystic is a Creature — Merfolk Wizard. Its oracle text reads: "{1}{U}: Look at the top card of target player's library. *"Read the roots tell the tale Future forms in waving weeds Higher than truth is hope." —*Rootwater Saga** Power/Toughness: 1/1"