Potential Slayer tracking spell

This spell is performed by Willow in the episode Potential to find the potential slayer who lives in Sunnydale.

Ingredients / Requirements
skin of snake and chrysalis too. To indicate the fresh reborn: tumbleweed and rosebush thorn. An egg that means the life to come Take this, oh Spirits, and my spell is done.
 * Recital:  To light the aura of the new: