Kanstbreith (Can-st bray-th)

Over the past hundred years, the streets of Xeoti have harboured a set of stories around a figure emerging from walls and shadowy corners. The oldest of these stories describe the figure like a flickering image, there for but a moment at a time. Most were at first dismissed as tales of drunks wandering the alleys late at night. The flickering image would move with some kind of purpose, heading toward the Emperor's Palace before disappearing altogether.
Then the figure seemed to consolidate just a bit more, and with it a low unearthly wail that every sighting of the being held in common. Looking like a person dressed in dark, dripping clothing, the figure periodically calls out.
"Kanstbreith"
From the accounts of several Xeotian citizens and even visitors from abroad, one urban legend began to emerge. Mostly the creature is merely sighted but there are a few stories and even headlines of people being found insane after coming in contact with it and even bodies found along its path with blackenend marks around their neck, dead from asphyxiation. The best known sighting was by Noan the Skeptic:

I came to Xeoti on business, with my head on straight. I left wondering if I could trust my own senses. On Lavendra Street, it was quiet until I heard a reedy voice calling out.
Kanstbreith. What does it mean? I had heard the mad ramblings of people I had thought mere drunkards. Nothing can prepare you for the unearthly mantra of that creature. Its voice hits you before the vision of it does. A man dressed in purple so dark that it is almost black and dripping with ebony ichor. A face obscured in a veil of dripping black hair. In the creature's hand, it wields a tall staff that it uses as a walking stick and it shambles forward.
It flickers in and out of corpreal form as it shambles toward the palace. Its mantra continues. It always seems more solid from the corner of your eyes but when looked at directly it is like looking at something through a fog.
I was not stupid enough to let it touch me but I believe people when they say that to let it touch you is to go mad or lose your very life.