A-Urza, Powerstone Prodigy

Mana cost: {1}{U}

Type: Legendary Creature — Human Artificer

{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.")

All printings