Is Discreet Retreat legal in Standard, Modern, and Commander?

Discreet Retreat is legal in: Legacy, Vintage, Commander.

Discreet Retreat

Q: What type of card is Discreet Retreat?

Discreet Retreat is an Enchantment — Aura. Its oracle text reads: "Enchant land Enchanted land has "{T}: Add two mana of any one color. Spend this mana only to cast outlaw spells or activate abilities of outlaw sources." (Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.) Whenever you cast your first outlaw spell each turn, you draw a card and you lose 1 life."

Enchantment — Aura

Enchant land

Enchanted land has ": Add two mana of any one color. Spend this mana only to cast outlaw spells or activate abilities of outlaw sources." (Assassins, Mercenaries, Pirates, Rogues, and Warlocks are outlaws.)