Draconic Takeover

When Draconic Takeover enters the battlefield, each player sacrifices all non-dragon creatures they control. For each 2 life paid while casting this spell, each opponent returns a creature they sacrificed this way to the battlefield.

{p/b}{p/b}{b}{b}{b}, {t}, Sacrifice a creature: For each dragon you control, exile a card from the top of your library, each opponent loses life equal to the number of cards exiled this way, then if you control 7 or more dragons, until end of turn you may cast spells and p