Is Sly Requisitioner legal in Standard, Modern, and Commander?

Sly Requisitioner is legal in: Modern, Pioneer, Legacy, Vintage, Commander, Historic.

What type of card is Sly Requisitioner?

Sly Requisitioner is a Creature — Human Artificer. Its oracle text reads: "Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Whenever a nontoken artifact you control is put into a graveyard from the battlefield, create a 1/1 colorless Servo artifact creature token. Power/Toughness: 2/2"