Sheut

The sheut is a person's shadow, and one of the five concepts of the egyptian soul. The sheut is the mark someone leaves on the world, so if someone has no shadow they have no effect on the world, therefore they can not exist. It is also like a backup copy of the soul, so if a person's ib is eaten by Ammit the Devourer, but new evidence comes to light then Osiris can return the soul from oblivion using the sheut. Sadie Kane using this magic to return Bes to full life after his ren was devoured by Khonsu. When encased in a shabti of the person they represent, they can be used in an execration ceremony that is infinitely more powerful than the standard spell and is strong enough to completely erase Apophis himself. The sheut is the main focus of the book The Serpent's Shadow