Lublamai spoke, emitted some tremulous noise of disbelief, of fear, of confusion, but it dissipated soundlessly after the briefest moment. He stared with an open mouth at the reflection.

The thing unfolded. The sense was of a blossoming. An expansion after being enclosed, like a man or woman standing and spreading their arms wide after huddling foetally, but multiplied and made vast. As if the thing’s indistinct limbs could bend a thousand times, so that it unhinged like a paper sculpture, standing and spreading arms or legs or tentacles or tails that opened and opened. The thing that had huddled like a dog stood and opened itself, and it was nearly the size of a man.

Teafortwo screeched something. Lublamai opened his mouth wider and tried to move. He could not see its shape. Only its dark, glistening skin and hands that clutched like a child’s. Cold shadows. Eyes that were not eyes. Organic folds and jags and twists like rats’ tails that shuddered and twitched as if newly dead. And those finger-long shards of colourless bone that shone white and parted and dripped and that were teeth . . .

As Teafortwo tried to bolt past Lublamai and Lublamai tried to open his mouth to scream, his eyes still fixed to the creature in the mirror, his feet skittering on the flagstones, the thing at the top of the stairs opened its wings.

Four rustling concertinas of dark matter flickered outwards on the creature’s back, and outwards again and again, slotting into position, fanning and expanding in vast folds of thick mottled flesh, expanding to an impossible size: an explosion of organic patterns, a flag unfurling, clenched fists opening.

The thing made its body thin and spread those colossal wings, massive flat folds of stiff skin that seemed to fill the hall. They were irregular, chaotic in shape, random fluid whorls; but mirrorperfect left and right, like spilt ink or paint patterns on folded paper.

And on those great flat planes were dark stains, rude patterns that seemed to flicker as Lublamai watched and Teafortwo fumbled with the door, wailing. The colours were midnight, sepulchral, black-blue, black-brown, black-red. And then the patterns did flicker, the shadow-shapes moved like amoeba in a magnifying lens or oil on water, the patterns left and right still matching, moving in time, hypnotic and heavy, faster. Lublamai’s face creased. His back itched maniacally with the thought that the thing was behind him. Lublamai spun to face it, gazed directly into the mutating colours, the dusky vivid show . . .

. . . and Lublamai no longer thought of screaming but only of watching as those dark markings rolled and boiled in perfect symmetry across the wings like clouds in a night sky above, in water below.

Teafortwo howled. He turned to see the thing that was now descending the stairs, those wings still unfurled. Then the patterns on the wings caught him and he stared, his mouth open.

The dark designs on those wings moved beguilingly.