Cackler, Undercity Dealer

{x}: Put target instant, sorcery, or artifact card
from your graveyard onto the bottom of your library, where X is the number of times this
ability has resolved this round.
{x}{u/b}{u/b}{u/b}: Sacrifice Cackler. Reveal X cards
from the bottom of your library, you may cast
any number of artifact, instant, and/or sorcery
cards revealed this way without paying there
mana costs. Any cards cast this way can't
be countered.