Silitar, the Calm Water

: Merfolk you control get +1/+1 and have hexproof. Whenever a Merfolk enters the battlefield under your control, put a loyalty counter on Silitar.
-1: Put a +1/+1 counter on target creature you control, then proliferate.
-2: Tap target creature, it doesn't untap during its owner's next untap step. Draw a card. If the creature had power 4 or greater, you gain 4 life.