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'{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.
'{T}: Add {C}. If you control an Urza's Mine and an Urza's Power-Plant, add {C}{C}{C} instead.
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}:...
'When The Mightstone and Weakstone enters, choose one — • Draw two cards. • Target creature gets -5/-5 until end of turn. {T}: Add {C}{C}. This mana can't be spent...
'{T}: Add {C}. If you control an Urza's Mine and an Urza's Power-Plant, add {C}{C}{C} instead.
'{T}: Look at target player's hand.
'{T}: Add {C}. {T}: Add {∞}. Activate only once and only if you control an Urza's Mine, an Urza's Power-Plant, and an Urza's Tower. {7}, {T}: Head to AskUrza.com and...
'Each player draws two cards, then discards three cards, then loses 4 life.
'{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.
'{T}: Look at target player's hand.
'As this artifact enters, choose a creature type.
Creature spells of the chosen type cost {2} less to cast.
'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}:...