Surveillance Magic is a type of magic used to see into the Duat, the magical realm underneath the mortal world. Using it, a magician can locate people even in the dark, gods, demons, godlings etc. The eyes of the magicians using this type of magic glows.
The Kane Chronicles[]
The Serpent's Shadow[]
This type of magic was used by Magicians in the 21's Nome to guard their Nome from any kind of attackers.
Sadie Kane used it multiple times like while combatting forces of Apophis, who attacked the Twenty-First Nome to destroy the copies of books written by Setne of defeating Apophis. She also uses this magic to look at the resurrected Walt where she sees Anubis. She used it to see the gods attacking Apophis at the end of the book.
Carter Kane used it to see Thoth and how many demons were attacking him, estimating the time Thoth had before he would be overwhelmed.
Demigods & Magicians[]
The Crown of Ptolemy[]
When reinforced with power from gods, the magician can see further in the Duat and his/her senses are expanded greatly. This was used by Carter and Sadie Kane and briefly Percy Jackson while hosting Nekhbet.