﴿ وَحِفْظًۭا مِّن كُلِّ شَيْطَٰنٍۢ مَّارِدٍۢ ﴾

“and have made them secure against every rebellious, satanic force,”

and to guard wa-hifzan is in the accusative because of an implied verb that is to say ‘We have guarded it with meteors’ from every min kulli is semantically connected to the implied verb any rebellious devil who is a transgressor in rebellion against obedience.