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. (Do both if was spent.)
Creatures your opponents control lose flying until end of turn if was spent to play Invert the Skies, and creatures you control gain flying until end of turn if was spent to play it. (Do both if was spent.)
--This card has no flavor text --