Belahzur, much like Scree has the power to enter the realm of Mortalis, where he sets off the events of Primal by reabducting Lewis in a violent manner, Chaos needs Lewis to bring the destruction of order.
Whilst in Mortalis, Belahzur skins a vagrant to take on a human form. Physically, this body is noticably larger than the average human, it's face and structure are almost reminscent of Frankenstein and it's eyes are an evil glow of red.
Whilst not in this form, Belahzur takes on an appearance that looks somewhat more demonic, with spikey spines protruding from his back, multiple sets of jaws and a toad-like texture to it's skin and face.