Is Sacred Guide legal in Standard, Modern, and Commander?

Sacred Guide is legal in: Legacy, Vintage, Commander.

Sacred Guide

Q: What type of card is Sacred Guide?

Sacred Guide is a Creature — Human Cleric. Its oracle text reads: "{1}{W}, Sacrifice this creature: Reveal cards from the top of your library until you reveal a white card. Put that card into your hand and exile all other cards revealed this way."

Creature — Human Cleric

, Sacrifice this creature: Reveal cards from the top of your library until you reveal a white card. Put that card into your hand and exile all other cards revealed this way.