Tirer la Couverture

"All spells leave a trace signature. It's just not perceptible to the human eye. In this case, it could be the image of a hand choking your mother."

- Rupert Giles

Tirer La Couture ("pull the curtain back") is a ritual that enables a person to enter a trance wherein he or she can perceive the trace signature of spells cast nearby.

Ingredients / Requirements

 * Incense, magic sand, and various magical talismans.

Appearances

 * No Place Like Home