Is Trained Pronghorn legal in Standard, Modern, and Commander?

Trained Pronghorn is legal in: Legacy, Vintage, Commander, Pauper.

Trained Pronghorn

Q: What type of card is Trained Pronghorn?

Trained Pronghorn is a Creature — Antelope. Its oracle text reads: "Discard a card: Prevent all damage that would be dealt to this creature this turn. *"The desert asked the Ancestor for children, and the antelope were born." —Nomad myth* Power/Toughness: 1/1"