Sargatanas sat, only occasionally lifting or lowering his flaming head. A few times he raised a finger to his lips as if he were about to speak but then changed his mind. Through the night he did not stir, the only sign of life being the guttering sparks from his knit brow. His form shifted frequently, sometimes subtly, sometimes drastically. For one night he had no head at all, only concentric multicolored rings of flames with rotating horns at their center.
-God’s Demon (page 212)

Before him, Sargatanas waited, head lowered and aflame in a blazing coronet of leaping fire. The top of his head had broadened out to accommodate six lidless and staring eyes.
-God's Demon (page 266)

She watched as he moved slowly, painfully, out into the water, which had begun to steam and bubble violently around him. From her distance she could just see that his body was changing, at first slowly and then with gathering rapidity. His wings grew broad and full, spreading into wide petal-shapes, finned membranes, or abstract forms held together with traceries of glyphs. His trunk and legs and arms grew luminous, expanding and contracting with an array of plates, fins, spines, and horns, some of which reached for yards around him. And all the while his head blazed like the brightest of torches, with only the shadowy suggestions visible of the changes that were taking place.
-God’s Demon (pages 270-271)

When no more demons appeared at the entrance, Sargatanas and Valefar walked the length of the tent and stopped just in front of the seated figures. Eligor saw that his lord had shifted his armored form to accommodate the many cascading winglets and fins that hung elegantly about him like a multilayered cape. Half his height above him his Great Seal hung, casting its steady, fiery glow upon his head and shoulders. In his hand was the curved sword Lukiftias, which twitched and trembled, eager, it would seem, for the impending battle.
-God's Demon (page 464)