Fanged Nightterror

Somnian strike (A creature damaged by this becomes tapped, and doesn't untap during its controller's next
untap step.)
At the beginning of each opponent's upkeep, put
a +1/+1 counter on Fanged Nightterror for each creature that player controls that's tapped.
One would be wise to be wary, the nightmares of the
autumn forest are scary, gnashing fangs and cruel cackling, are sure to leave your bones rattling