Azorius Traffic Enforcement
Creatures opponents control entering the battlefield don't cause backup abilities to trigger.
At the beginning of your combat step, detain target creature with backup or vehicle an opponent controls. (Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.)
At the beginning of your combat step, detain target creature with backup or vehicle an opponent controls. (Until your next turn, that permanent can't attack or block and its activated abilities can't be activated.)