UnleashUnleash is a keyword that represents two static abilities. “Unleash” means “You may have this permanent enter with an additional +1/+1 counter on it” and “This permanent can’t block as long as it has a +1/+1 counter on it.” (CR 702.98) (You may have this creature enter with a +1/+1
counterTo counter a spell or ability is to cancel it: remove it from the stack without resolving it. A counter on an object or player is instead a marker that changes characteristics or interacts with rules or abilities; for example, a +1/+1 counter modifies a creature’s power and toughness. (CR 701.6; 122.1) on it. It can't block as long as it has a +1/+1
counterTo counter a spell or ability is to cancel it: remove it from the stack without resolving it. A counter on an object or player is instead a marker that changes characteristics or interacts with rules or abilities; for example, a +1/+1 counter modifies a creature’s power and toughness. (CR 701.6; 122.1) on it.)