Consecration of the Cabal

I, II — You may sacrifice a creature. If you do,
draw three cards and you gain life equal to that creature's toughness.
III — You may pay X life. If you do, search your library for a card with converted mana cost X or
less, reveal it, and put it into your hand. Then
shuffle your library. You may cast that card
without paying its mana cost this turn.