Is Shieldmage Advocate legal in Standard, Modern, and Commander?

Shieldmage Advocate is legal in: Legacy, Vintage, Commander, Pauper.

Shieldmage Advocate

Q: What type of card is Shieldmage Advocate?

Shieldmage Advocate is a Creature — Human Cleric. Its oracle text reads: "{T}: Return target card from an opponent's graveyard to their hand. Prevent all damage that would be dealt to any target this turn by a source of your choice."

Creature — Human Cleric

: Return target card from an opponent's graveyard to their hand. Prevent all damage that would be dealt to any target this turn by a source of your choice.