Is Smoke Shroud legal in Standard, Modern, and Commander?

Smoke Shroud is legal in: Modern, Legacy, Vintage, Commander, Pauper, Historic.

Smoke Shroud

Q: What type of card is Smoke Shroud?

Smoke Shroud is an Enchantment — Aura. Its oracle text reads: "Enchant creature Enchanted creature gets +1/+1 and has flying. When a Ninja you control enters, you may return this card from your graveyard to the battlefield attached to that creature."