Aatrokus, the Darkened One

Indestructible, Hexproof, Devour
When Aatrokus, the Darkened One kills an enemy,
grant him +1/+1. If he hasn't killed a unit last
turn, grant him -1/-1.
If Aatrokus, The Darkened One's health would be
reduced below 5 by this effect, exile him.
"Let me carve flesh, let me cloak myself in the slaughter.
Hide me in their carnage... hide me from this suffering."