That day they are mistaken to give Iorverth meditation design to ST! Frightener would get a really good value combined with such gold card. Unfortunately, it only optimises weather decks besides countering enemy spies.
The issue with monster Frightener is that it was designed mainly to combo with the weather decks. That's why Dagon, even tough it is not that good, still finds a high popularity, while Eredin was murdered.
ST lock is as good as monster, coz it align a target for schorch/schirru or igni which are auto-included in most ST decks