Bolas - Sudden appearance

He hadn't dropped from the sky, hadn't crept from hiding. He was simply there, where nothing but dust and foul odors had been before. His wings stretched high between the opposing walls of the crevice, and his bulk was a living avalanche that filled the passage entirely.

Jace and Liliana scrambled to their feet and shrank back against the far wall. Both knew full well that if Nicol Bolas had wanted them dead, they would already be so much ash on the wind or detritus in the back of his throat. But such knowledge was nothing in the face of instinctive fear.

***

Agents of Artifice, Chapter 26