Rayla, the Loyal

+1: Draw one card, Rayla, the Loyal deals 1 damage to any target.
-2: Gain 7 life, Rayla, the Loyal has 7 turns to kill target creature. If it doesn't Rayla, the Loyal loses half of its Loyalty counters.
-X: Exile Rayla, the Loyal. Draw 17 cards from your opponents Library and discard them.