Scatterbrain Keykeeper

Vigilance
Rally - Whenever Scatterbrain Keykeeper or another Ally enters the battlefield, detain target creature an opponent controls. (Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.)
"-gilant! ... Screw this. Now, how the heck can I hide these keys so that they won't trace back to m- Yes sir! Ever vigilant!"