Atuen of the Mystic Growth

Atuen of the Mystic Growth enters the battlefield
with X +1/+1 counters on him.
When Atuen enters the battlefield, proliferate.
If a creature you control without a +1/+1 counter
on it would die, put a +1/+1 counter on it instead.
"My goal? Simple. Wipe your infuriating civilization
off the face of this planet, and retake it for the wilds."