The mini would suggest a creature with two attacks. If both hit it's clamped those arms on the side of a PC's head. Next round the PC gets a saving throw or his brain gets sucked through his ears!
Bear in mind sucking brain through orifice is very Mind Flayer so you might want to keep that ability just for those guys? Flayer hound? But then why would the Flayers want their dogs to have all the fun?