Is Frostbridge Guard legal in Standard, Modern, and Commander?

Frostbridge Guard is legal in: Standard, Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

Frostbridge Guard

Q: What type of card is Frostbridge Guard?

Frostbridge Guard is a Creature — Elemental Soldier. Its oracle text reads: "{2}{W}, {T}: Tap target creature. *The sentry watched impassively, its spear unmoving. One by one, the would-be adventurers stumbled and fell, frostbitten, to the ground.* Power/Toughness: 2/2"