The serpent demon looks like a gigantic serpent from the hips down, and vaguely like a human male from the waist up, but with a fanged, serpentine head. The serpent demon encountered by the companions had scaly skin and four arms. It was also highly poisonous.
A blood demon looks like a short, scrawny human – one without skin, from whose exposed flesh blood oozes and drips constantly. Wherever it goes it leaves bloody footprints and handprints. It has claws on its hands, and its feet are cloven. The blood demon the heroes fought laid low both Marcus and Grull before it was finally vanquished.