Mur Kul, Depths' Warrior

0: Put a +1/+1 counter onto target Merfolk you control. Then, Proliferate.
-2: Until the of this turn, whenever a Merfolk you control deals combat damage to a player, draw a card.
-7: You get an emblem with "Merfolk you control are unblockable as long as they have a +1/+1 counter on them."