Urza, Powerstone Prodigy
Legendary Creature - Human Artificer
| Power/Toughness:
1 / 3
(CMC 3)
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.")