Cry Havoc! The Dogs of War 5e/OSR

"Who are the Dogs of Orcus? That's hard to pin down exactly. A member could be a powerful mage, a high priest, a noble leader ... even your neighbor. The only thing they have in common is the evil burning a bright flame in their black hearts. All heard the voice of the Prince of the Dead whisper in their ears, and they responded with various atrocities to shock the senses."