Sigil Magic

Sigil Magic(判魔法: Han mahō) otherwise known as Demon Name Magic(悪魔称号魔法: Akuma shōgō mahō), is a very rare magic, border lining on being a curse due to its nature. It is used to channel the trait, power, or attributes of a specific demon depending upon which sigil is being used. Each sigil is different and causes a different effect.

Description:
While this magic is technically classified as a form of holder magic, it could also be called an enchantment as the spells enchant the users with certain ailments or other forms of effects. There is no one creator of this magic, or if there was, the name of that person was lost to time. It is a very dangerous type of magic, for both the user, and the target. It requires the user to draw a sigil, or the name of a demon, on their body or on another object.