A Bat-like MSM Ethereal monster with black skin (literally), 4 black wings with holes in them, gray spots, red eyes, 2 arms, 2 horns, and black smoke emitting from it body. you can never fully tell what kind of mood the Grumpyre is in. Thanks to its shifting eyes and mouth. For example, it might appear sad when really it's happy, or afraid when it's actually having a blast.