Lost Lightning

Exploration Stage: Witches' Abode
From: Inspector
Description: I've read about traps that catch very ordinary spherical lightning before ...... that really existed, not made up, but it might work for black spherical lightning born in fog. Can you try to find the lightning maze for me? If I find it, I'll show you how to use it.
Completed: This is exactly what I read in the book! When the sphere lightning hits this thing, it will wander around in a closed maze. That means it will be unable to move. Then Isabelle would be able to neutralize it easily.