Mystic Extraction

Multikicker--Pay 1 life (You may pay an additional
1 life any number of times as you cast this spell.)
Search target player's library for a card and exile
it face down, then they shuffle their library. You
may look at and cast that card for as long as it
remains exiled, and you may spend mana as
though it were mana of any type to cast that
spell. Add {b} for each time Mystic Extraction
was kicked.