Great Potoo

Flying,
Unleash (You may have this creature enter the battlefield with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.)
This nocturnal predator is usually seen perched high above the ground while forgaging, sallying out when prey is spotted. After the pounce, the potoo almost always returns to its previous perch.