The Burning Ghost

The vengeance spirit is a powerful thing, and it can’t be easily stopped. Fortunately, the Vervains have kept it mollified and asleep, though it stirs occasionally, enough to send out its avatar, the Burning Ghost.
The Burning Ghost is the soul of someone whose thirst for vengeance twisted and completely blinded them. The vengeance spirit gave this power to Strype and, later, to William Warner. Unfortunately, the Burning Ghost is a shell, driven only by a need to hurt and main. It is directed by the will of the vengeance spirit, and if the vengeance spirit cannot find the target of vengeance, it will strike out at anyone and everyone at hand.
In this fashion, the Burning Ghost is more a force of nature than a malicious thing. Worse, its appetite can never be sated; that’s not the way vengeance works. It only obliterates everything in its path until it eventually devours itself.