A Mental Blow

Exploration Stage: Room of Fate
From: Isabelle
Description: Items connected to Martha's childhood will help us get her back. I think I know what to look for next. The presence of powerful mediums usually means that any nearby electronic devices frequently overheat and break. Could you find a damaged electrical coil or something?
Completed: Good job! I never could've done it without you! Just look at this isolator! It looks like it's been hit by lightning. Obviously someone - either Martha or her sister Erin - was unable to cope with the intensity of her mental field. This is just what I had in mind.