Arya Namarri, the Unyielding

Hexproof
When Arya Namarri, the Undeterred enters the
battlefield, create a 5/5 black and green zombie
creature token with trample and deathtouch.
Pay 2 life: put a +1/+1 counter on target creature.
If you control a creature with fifteen or more
+1/+1 counters on it, sacrifice that creature.
If you have 15 or more life that your starting life
total, your life total becomes 15.