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

Tideshaper Mystic is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Tideshaper Mystic

Q: What type of card is Tideshaper Mystic?

Tideshaper Mystic is a Creature — Merfolk Wizard. Its oracle text reads: "{T}: Target land becomes the basic land type of your choice until end of turn. Activate only during your turn. *He paints with drop and shimmer a world that exists only in the wistful heart.* Power/Toughness: 1/1"