The Hall of Tra was cold and lightless. His wolf-eye caught the ghost radiation of barely smouldering firepits. In terms of heat and light, the Wolves were making no allowances for human tolerances of comfort. They had given him a pelt and an eye to see through the dark with. What more could he want? He realised he wasn’t alone. The company was all around him. Their body heat was barely detectable, dimmer than the dull firepits. The Hall was a massive natural cavern, ragged and irregular, and the Astartes were ranged around it, huddled and coiled in their furs, as immobile as a sibling pack of predators, gone to ground overnight, dormant and pressed close for warmth. The Upplander’s breath was steaming the frigid air, but barely a curl escaped Ogvai’s mouth alongside his words. Astartes biology was marvellously adapted for heat retention.

Pg.107 Prospero Burns