To Identify the Source of an Injury is a potion that allows the user to determine the source of an injury. It is created by boiling a piece of clothing covered in blood in water with other, unknown ingredients. The clothing will then start to glow, revealing the source of an injury.


In 2003, Piper Halliwell used this potion to identify an injury sustained by Paige Matthews. When her soup began to glow white, she was able to determine Paige was not hit by an Energy Ball, but by a Plasma Ball.[1]


  1. As seen in Love's a Witch.