Is Soulsworn Jury legal in Standard, Modern, and Commander?

Soulsworn Jury is legal in: Modern, Legacy, Vintage, Commander, Pauper.

Soulsworn Jury

Q: What type of card is Soulsworn Jury?

Soulsworn Jury is a Creature — Spirit. Its oracle text reads: "Defender (This creature can't attack.) {1}{U}, Sacrifice this creature: Counter target creature spell. *In death, as in life, they protect the Grand Arbiter from exposure to contrary points of view.* Power/Toughness: 1/4"