Sshn'sth, Sea Serpent

+1: Target creature has base power 0 until your next turn. If it had power 3 or greater, put a -1/-1 counter on it and draw a card.
-3: Put a -1/-1 counter on each of up to three target creatures.
-6: You get an emblem with 'Whenever you draw a card, destroy target creature with a counter on it.'