Vraz-Uruth

To Riga, they smelled of rotten honey and alcohol, a tell-tale sign of Fey. And they called Riga 'seedling', something Magda did too. A Hag of some kind, or Deception?

See: Riga's Vision with Vraz-Uruth

[Riga, Religion 28]

The demon prince of Deception, as formless and tempting as desires shift in each mortal, offering warmth in the winter and a cold shade in the summer

Knowledge on Vraz-Urath is known to be EXTREMELY unreliable. It seems as though any demon that was summoned in attempts to speak of them is incapable of telling a truth, or was presented with different information. Each cult seems to follow a different version of the demon prince, but they always link back to deception, to fulfilling desires while not speaking of costs.