They found their way through a labyrinth of small salons to the octagonal main room of the Ruelle. It had been transformed; shimmering trees, their bare boughs and trunks painted white, stood at intervals, festooned with dark green wreaths and dangling red glass globes. A glimmering mural portrayed a forest scene: a glacier edged by a grove of snowcapped pines, owls peeking out from the shadows between the trees. A black-haired woman with the body of a serpent coiled around a lightning-struck tree; her scales gleamed with gold paint. At the front of the room, Malcolm Fade, the purple-eyed High Warlock of London, seemed to be leading a group of faeries in an intricate dance.

The floor was piled with heaps of what looked like snow, but on closer examination was delicately cut white paper, kicked up in drifts by dancing Downworlders. Not everyone was dancing, of course: many of the salon’s guests were crowded at small circular tables, their hands wrapped around copper mugs of mulled wine. Nearby, a werewolf and a faerie sat together, arguing about Irish home rule. Cordelia had always marveled at the mix of Downworlders that attended the Hell Ruelle; enmities out in the world between vampires and werewolves, or between different faerie courts, seemed to be suspended for the sake of art and poetry. She could understand why Matthew liked it so much.

“Well, well, my favorite Shadowhunter,” drawled a familiar voice. Turning, Cordelia recognized Claude Kellington, a young werewolf musician who oversaw the entertainment at the Ruelle. He was seated at a table with a faerie woman with long, blue-green hair; she stared curiously at Cordelia. “I see you brought Fairchild,” Kellington added. “Convince him to be more entertaining, will you? He never dances.”

“Claude, I am crucial to your entertainments,” Matthew said. “I am that irreplaceable thing, the eager audience.”

“Well, bring me more performers like this one,” Kellington said, indicating Cordelia. “If you happen to meet any.”

Cordelia couldn’t help but recall the performance that had so impressed Kellington. She’d danced on the Ruelle’s stage, so scandalously that she’d rather shocked herself. She tried not to blush now, but rather to appear a sophisticated sort of girl prepared to dance like Salome at the drop of a hat.

She nodded at the decorated boughs. “Is Christmas celebrated at the Hell Ruelle, then?”

“Not exactly.” Cordelia turned to see Hypatia Vex, the patroness of the Hell Ruelle. Though Malcolm Fade owned the place, the guests were invited by Hypatia; anyone she disapproved of would never make it past the door. She wore a shimmering red gown, and a gilt-dipped peony was tucked into her cloud of dark hair. “The Ruelle does not celebrate Christmas. Its attendees may do what they like in their own homes, of course, but in December the Ruelle pays homage rather to its patron with the Festum Lamia.”

“Its patron? You mean… you?” said Cordelia.