Humphrey’s face lit up when you enter his shop. He is always happy to see you, and he gets off his chair and approaches the counter to see what he can do for you today. His frowns, however, once he hears your description of the creature, then turns his head back and raises his voice:
"Stefan! The folio on uncanny creatures, third shelf, leather binding. Quickly now!!"
The young boy returns with the tome a abort moment later, and Humphrey lays it on the counter between you and him, flipping carefully through the pages until he finds what he is looking for.
"Here. This is what you describe." His finger taps a woodcut sketch of a faceless, shadowy figure. "The Guild calls it a doppelgänger. Old legends speak of it as bringer of chaos, murder, and upheaval wherever it walk. It is said to take not only the outward appearance of those it imitate… but also their mannerisms, even fragments of memory, making it nearly impossible to detect its true nature..until it's too late."
He closed the book, but his expression had grown more grave. "It is a vile creature, if it exists beyond legend. And if such a thing is loose in Threshold…" He looked and shakes his head"…why do you ask me about it now? What have you seen?"