Is Stimulus Package legal in Standard, Modern, and Commander?

Stimulus Package is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

What type of card is Stimulus Package?

Stimulus Package is an Enchantment. Its oracle text reads: "When this enchantment enters, create two Treasure tokens. (They're artifacts with "{T}, Sacrifice this token: Add one mana of any color.") Sacrifice a Treasure: Create a 1/1 green and white Citizen creature token."