Is Urza, Powerstone Prodigy legal in Standard, Modern, and Commander?

Urza, Powerstone Prodigy is legal in: Modern, Pioneer, Legacy, Vintage, Commander.

Urza, Powerstone Prodigy

Q: What type of card is Urza, Powerstone Prodigy?

Urza, Powerstone Prodigy is a Legendary Creature — Human Artificer. Its oracle text reads: "Vigilance {1}, {T}: Draw a card, then discard a card. Whenever you discard one or more artifact cards, create a tapped Powerstone token. This ability triggers only once each turn. (The token is an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.")"

Legendary Creature — Human Artificer

Vigilance

, : Draw a card, then discard a card.

Whenever you discard one or more artifact cards, create a tapped Powerstone token. This ability triggers only once each turn. (The token is an artifact with ": Add . This mana can't be spent to cast a nonartifact spell.")