Thread:Paul.rea/@comment-24544305-20150721181706/@comment-4091815-20150721184143

The rules are, thus far, only broken by the Dread Doctors chimeras.

Lydia and other banshee like her grandmother have been handling and crossing mountain ash throughout the series.

Deaton was absolute in his statement. Nothing supernatural can cross mountain ash.

Anything that crosses mountain ash is not supernatural.