Dimensional Shambler

The Dimensional Shambler is a extradimensional, predatory creature first appearing within the story: The Horror at the Museum, and returning in The Hunters from Beyond - both works held within the Cthulhu mythos.

Biology
Dimensional Shamblers are lanky, short, Humanoid creatures with skin tight and grey like that of a mummified Human. Their heads are described as resembling both Canid and Primate, with their eyes recessing to the point of appearing as yellow slits. Its arms are very long, and are equipped with huge claws, and their mouths are filled with crooked, stained teeth.

All Shamblers come from a alternate dimension described as "a long, gray, oozing plain, beneath skies where the fumes of Hell were writhing like a million ghostly and distorted dragons." While appearing solid, their existence in an alternate dimension makes them impossible to touch a Shambler, and visa versa. Thousands upon thousands of Shamblers live there.

Behavior
Like the Hound of Tindalos, these predatory creatures can venture into other universes to hunt for prey, able to jump in between dimensions at will without any effort. Shamblers can either hunt alone, or work together depending on the prey they wish to capture.

As Shambler are unable to take prey physically, they use a form of hypnotic ability on victims to bring them from their dimension back into the Shambler's dimension, where the victims' mind and soul are therefore devoured by the creatures. This hypnotic ability can be broken by a strong will, but larger groups have a stronger hypnotic ability than smaller ones.