Dark Soul

Dark Soul (Aka: Darkened Soul or Elhanan) is a soul, it can only be seen by souls, dogs and cats, they cannot be seen by other living beings such as humans, they are souls that have been darkened by betrayal and are looking for revenge, one of them is Elhanan which was killed in a hospital and it is trying to lure its enemies to its trap, Elhanan will lure its soul enemies to its room where it will sit on its chair, it will then lock the door, dissapear and force the soul to rest on the chair, when that happens Elhanan will destroy the soul causing it to be send to the eternal void

Method of killing
It will destroy the soul of its enemy

Trivia
The first known soul is named Elhanan because of a boss from a game called "Titan Souls", the boss is named "Knight Elhanan the Legendary Titan Slayer"

Its name is based on the game Dark Souls

Darkened Souls are based on the Scare Chair