Paper Summoning Circle

A Paper Summoning Circle, is a small sheet of paper inscribed with a magic circle to be used in the summoning of a familiar. The user drips their own blood onto the paper and then chants a specific appeal to then summon the familiar. If the user loses control of their familiar, simply tearing the sheet of paper will break the magic circle, causing the familiar to disappear.

Izumo Kamiki uses this method of summoning to summon Ukemochi and Miketsu, while Shiemi Moriyama also uses it to summon Nee.

Trivia

 * The visual design of the summoning circle appears to be based on the Magical Circle in the Lesser Key of Solomon; more specifically, the Ars Goetia.