Karkys, Thespian and Sadist

{t}, pay 3 life: Reveal the top three cards of your library. You may exile one card from among
them, and put a card with a mana value less than
or equal to the exiled card from your graveyard or
from the other revealed cards into your hand. If
you have activated this ability three or more
times this game, you may immediately cast the
card without paying it's mana cost instead of
putting it into your hand. Shuffle your library.