Cayman, Titan of Wet Gulag

When Cayman enters the battlefield, sacrifice
it unless it escaped.
Whenever Cayman enters the battlefield or
attacks, Reveal the top four cards of your library.
You may put a permanent card from among them
into your hand. Put the rest into your graveyard.
Then you may distribute either three +1/+1 or
-1/-1 counters on to up to three target creatures.
Escape -{b}{b}{g}{g}, Exile five other
cards from your graveyard.