User blog comment:Tommy,Klaus&Kol2012+/mistakes in supernatural/@comment-3045936-20150917232742

Honestly. The only (real) mistake I dislike is iron. It should affect fairies that is common lore. Their is lore that it can affect supernatural entities, demons, spirits, witches, etc. But, magic should be able to destroy iron or not be so resist to magic. The series get away with this as powerful kinds like from Angels or Gods magic aren't bound by this law.