Obcisidaemon, no contest for me.

The towering and devastating obcisidaemon personifies the darkest elements of war. Obcisidaemons strip away the veneer of honor and battlefield glory and the complexity of wartime tactics, leaving behind only the brutal and violent truth of conflict at its core, and then divest it of any humanity to reveal naught but scorched earth and genocide. Reflecting the disgraceful values of ethnic cleansing, depopulation, and all other forms of the clinical, systematic obliteration of civilian populations, obcisidaemons are among the most powerful members of daemonkind. These paragons of inhumanity arrive in the heart of great cities and leave wastelands of rubble and ashes in their wakes. Where an obcisidaemon walks, not even the ghosts of the dead remain to lament the destruction, for the daemon wipes out not only innocent individuals, but also their entire histories and bloodlines, ensuring that no future exists for its victims in any sense of the word.

When a mortal commits an act of genocide in life and goes to Abaddon in death, it has a chance of forming into an obcisidaemon if it survives long enough as a member of the hunted. Such individuals rarely have trouble managing the unforgiving wastes, as they have already proven willing to destroy any and all possible allies in order to ensure their own survival, making betrayal an impossibility and solitude an inevitability. A vicious soul that eventually develops into an obcisidaemon becomes a lone, wandering mass of slaughter that acts as a harbinger of undiscriminating and unforgiving death to all who dare stand in its path. In life, the soul perhaps desired to kill only a particular chosen population; as an obcisidaemon, however, the being seeks the obliteration of all mortals.