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Card Details
Creatures your opponents control lose flying until end of turn if 
was spent to cast this spell, and creatures you control gain flying until end of turn if 
was spent to cast this spell.
Illustrated by Randy Gallegos
Rulings (5)
Aug 1, 2008
If a creature changes controllers later in the turn, that won't change how Invert the Skies affected it.
Aug 1, 2008
If the spell is copied, the copy will never have had mana of the stated color paid for it, no matter what colors were spent on the original spell.
Aug 1, 2008
Invert the Skies affects only creatures on the battlefield at the time it resolves. If a creature enters later that turn, it won't be affected.
Aug 1, 2008
The spell cares about what mana was spent to pay its total cost, not just what mana was spent to pay the hybrid part of its cost.
Aug 1, 2008
The spell checks on resolution to see if any mana of the stated colors was spent to pay its cost. If so, it doesn't matter how much mana of that color was spent.