Demon Killer, also called Demon Slayer, is a recurring ability in the series.
Demon Slayer is the job level 11 ability for the Ranger. It deals 1.5 times the damage of a conventional attack to members of the demonkind family. It costs 8 MP to use.
demon is "an evil spirit or devil, especially one thought to possess a person or act as a tormentor in hell."A