The Hall grew silent and tense. There was a growing pressure on the air, like a gathering storm, like the moment before lightning strikes. And suddenly, all around the Great Auction Hall, wards and protections that had stood for centuries broke and blew apart in coruscations of vivid energies, shattered by a growing presence they were never meant to contain or keep out—a living presence, vast and inhuman, seeping into our reality like poison into a clear spring.

I knew what it was, what it had to be. I recognised the signs. A psychenaut; a traveller from some higher or lower dimension. An intruder that could not be stopped or turned aside because it was either too real or not real enough to be affected by human powers. I'd had some experience with psychenauts, back when I apprenticed with old Carnacki, the Ghost Finder. It didn't seem fair that I should have to face something so awful twice in one lifetime. I would have run, but I knew I'd never make it.

The crowd was already beginning to panic when the first protrusions from a lower dimension began to manifest. Unfocussed energies sleeted through the Hall, sparking black rainbows and shimmering auras around people who weren't actually there, before sinking into physical objects and lending them a horrible animation. Ugly, distorted faces formed themselves out of the materials of the walls, floor, and ceiling. Thick lips curled back to reveal jagged teeth, while dark eyes rolled grinding in their sockets, and abhuman voices shuddered through our heads, saying We are coming, we are coming. The wooden fingertips of a huge hand thrust slowly up from among the rows of seats, and the crowd scattered, shrieking and screaming, and shouting Words of Power that had no influence on what was forcing its way into our world from the underpinnings of reality.

The cheap wooden seats suddenly exploded into lashing wooden tentacles, springing out to wrap themselves around the fleeing crowd, holding them tightly. More screams rose as arms and legs broke under the inhuman pressure of the wooden bonds. Great faces in the floor drank up the spilled blood, making noises thick with meaning that predated language. The walls were swelling in and out, as though in rhythm to some great thing breathing, and the whole Hall shook, the floor rising and falling like a ship at sea.