Deal of a Lifetime

As an additional cost to cast this spell, pay {x}, where X is the amount of opponents.
Each opponent may pay 4 life. Search your library for an amount of cards equal to the amount of opponents that didn't pay 4 life, reveal them, then shuffle your library and put those cards on top of it in any order. Then, each opponent may pay 2 life. Draw cards equal to the amount of opponents that didn't pay 2 life.
"Here, let's make a deal..."