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From $0.25
'{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.
From $13.50
'When Urza enters, create a 0/0 colorless Construct artifact creature token with "This token gets +1/+1 for each artifact you control." Tap an untapped artifact you control: Add {U}. {5}:...
From $0.50
'Whenever a player casts an artifact spell, you may pay {1}. If you do, you gain 1 life.
From $16.75
'As this artifact enters, choose a creature type.
Creature spells of the chosen type cost {2} less to cast.
From $16.25
'{T}: Add {C}.
Metalcraft — {T}: Add {C} for each Urza's land you control. Activate only if you control three or more artifacts.
From $40.25
'As this artifact enters, choose a creature type.
Creature spells of the chosen type cost {2} less to cast.
From $22.50
'As this artifact enters, choose a creature type.
Creature spells of the chosen type cost {2} less to cast.
From $17.00
'As this artifact enters, choose a creature type.
Creature spells of the chosen type cost {2} less to cast.
From $18.25
'As this artifact enters, choose a creature type.
Creature spells of the chosen type cost {2} less to cast.
From $20.25
'As this artifact enters, choose a creature type.
Creature spells of the chosen type cost {2} less to cast.