Angrath, Chaos Minion

-2: Amass 2. (Put two +1/+1 counters on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.)
-3: Angrath, Chaos Minion deals 5 damage to any target.
-X: Amass x + 1. (Put two +1/+1 counters on an Army you control. If you don't control one, create a 0/0 black Zombie Army creature token first.)