Cauldron Ooze

Whenever one or more cards leaves any library, put a +1/+1 counter on Cauldron Ooze for each of those cards.
Whenever a spell or ability targets a player or permanent, put a -1/-1 counter on Cauldron Ooze for each of those targets.
Escape—{1}{u}{b}{g}, Exile four other cards from your graveyard. (You may cast this from your graveyard for its escape cost.)