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'{T}: Add {C}. If you control an Urza's Mine and an Urza's Tower, add {C}{C} instead.
'As an additional cost to cast this spell, tap four untapped artifacts, creatures, and/or lands you control.
Flying
'Until end of turn, lands you control gain "Sacrifice this land: Add {B}."
'{W}{W}, {T}: Prevent the next 4 damage that would be dealt this turn to target creature you control. Tap that creature. It doesn't untap during your next untap step.
'Target creature's controller sacrifices it, then creates X 1/1 green and white Elf Warrior creature tokens, where X is that creature's power.
'{T}: Add {C}. If you control an Urza's Mine and an Urza's Tower, add {C}{C} instead.
'{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.
'{U}{U}{U}, {T}: Return target permanent to its owner's hand.
'Target player draws X cards.
'{T}: Add {C}. If you control an Urza's Mine and an Urza's Tower, add {C}{C} instead.
'Choose two — • Untap two target permanents. • Tap each permanent target player controls with exactly one word in its name. • Discard all the cards in your hand,...
'{T}: Add {C}. If you control an Urza's Power-Plant and an Urza's Tower, add {C}{C} instead.