Created by the mad mage Diatoth, the Ebon Assassin is the combination of several creatures from different realms. This creature exists in the real world and nightmares at the same time. It is able to track it's prey through the nightmare realm, but must enter the real world to kill. Due to displacer beast genes it is never quite where it appears to be, this is not a set distance however, the Assassin can control this at will. Diatoth used these creatures until he mistook his own reflection for an enemy and forgot the command word to call the Assassin off. Since then the Assassins have reproduced and spread throughout all the known worlds. If the command words can ever be discovered again one could potentially control all the Assassins.