[K Peculier]

Could you give an example or scenario as to how you would use this spell?

Also you mentioned this can detect illusions and spirits are unable to phase through.

1. How foolproof is it at detecting illusions, is there any counter to this?
2. I'd probably make it so spirits equal or weaker to the casters strength is applicable to being trapped/kept to a reasonable degree so this isn't used as crutch way to counter everything spirit-like.