Is Shrine of Loyal Legions legal in Standard, Modern, and Commander?

Shrine of Loyal Legions is legal in: Modern, Legacy, Vintage, Commander.

What type of card is Shrine of Loyal Legions?

Shrine of Loyal Legions is an Artifact. Its oracle text reads: "At the beginning of your upkeep and whenever you cast a white spell, put a charge counter on this artifact. {3}, {T}, Sacrifice this artifact: Create a 1/1 colorless Phyrexian Myr artifact creature token for each charge counter on this artifact."