Is Puresight Merrow legal in Standard, Modern, and Commander?

Puresight Merrow is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Puresight Merrow?

Puresight Merrow is a Creature — Merfolk Wizard. Its oracle text reads: "{W/U}, {Q}: Look at the top card of your library. You may exile that card. ({Q} is the untap symbol.) *Stripped of his sight, he was free to see only the ideal.* Power/Toughness: 2/2"