Thread:Paul.rea/@comment-24544305-20150721181706/@comment-4091815-20150721182831

Nothing supernatural can cross a mountain ash barrier.

Banshee have shown no difficulty crossing mountain ash barriers.

Banshee are not supernatural.

Scott is repelled by mountain ash. He managed, through great effort that "almost killed" him, to break through a barrier once.

The exceptions to the mountain ash barrier must be in someway effected by the mountain ash to begin with. Lydia has never shown any indication of any effects.