Ankhseram Black Magic

Death Magic (死の魔法 Shi no Mahō) is a Black Art utilized by Zeref.

Description
A Black Art Magic which gives its users the ability to cause any living thing around them to die. The body of the caster is cursed by this Magic, which makes the Magic burst at random times, without control, stealing the life of the caster's surroundings. However, when the weight of life is forgotten and the user fails to care about people's lives, it allows him to fully control the Magic at his will. Certain things can protect people from the death praying such as Natsu Dragneel's scarf.