|“||…a tall, lean man of dead black coloration but without the slightest sign of negroid features: wholly devoid of either hair or beard, and wearing as his only garment a shapeless robe of some heavy black fabric. His feet were indistinguishable because of the table and bench, but he must have been shod, since there was a clicking whenever he changed position. The man did not speak, and bore no trace of expression on his small, regular features. He merely pointed to a book of prodigious size which lay open on the table.||„|
|~ H.P. Lovecraft , The Dreams in the Witch-House|
He is an avatar of Nyarlathotep who coerce peoples into signing the black Book of Azathoth.
When traveling in the fourth dimension he looks like a large wisp
He leaves behind him half-circles shaped prints suggesting he has hoofed feet.