"That object—no larger than a good-sized rat and quaintly called by the townspeople “Brown Jenkin”—seemed to have been the fruit of a remarkable case of sympathetic herd-delusion, for in 1692 no less than eleven persons had testified to glimpsing it. There were recent rumours, too, with a baffling and disconcerting amount of agreement. Witnesses said it had long hair and the shape of a rat, but that its sharp-toothed, bearded face was evilly human while its paws were like tiny human hands. It took messages betwixt old Keziah and the devil, and was nursed on the witch’s blood—which it sucked like a vampire. Its voice was a kind of loathsome titter, and it could speak all languages. Of all the bizarre monstrosities in Gilman’s dreams, nothing filled him with greater panic and nausea than this blasphemous and diminutive hybrid, whose image flitted across his vision in a form a thousandfold more hateful than anything his waking mind had deduced from the ancient records and the modern whispers." H.P. Lovecraft, Dreams in the Witch House
A rat-thing familiar from the Strange Aeons 'Witches and Familiars' pack. At the time of this writing I don't think it's available, as Uncle Mike's gears up for the second edition of Strange Aeons.