Is Glittering Massif legal in Standard, Modern, and Commander?

Glittering Massif is legal in: Legacy, Vintage, Commander.

What type of card is Glittering Massif?

Glittering Massif is a Land — Mountain Plains. Its oracle text reads: "({T}: Add {R} or {W}.) This land enters tapped. Cycling {2} ({2}, Discard this card: Draw a card.) *Iridescent debris and chromatic chemical fires litter Kavaron with the beauty of destruction.*"