Is Scion of Ugin legal in Standard, Modern, and Commander?

Scion of Ugin is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Pauper, Historic.

What type of card is Scion of Ugin?

Scion of Ugin is a Creature — Dragon Spirit. Its oracle text reads: "Flying"

Creature — Dragon Spirit

Flying

Set Pioneer Masters

Rarity Common

Artist Cliff Childs

Creature Flying Modern Pioneer Commander