A terrifying, humanoid alien creature with a muscular yet skeletal frame. Its skin should be a mix of slick, bioluminescent black and red, with sinewy muscles exposed along its limbs and torso. The creature has elongated arms and legs, with sharp, clawed hands, and a grotesque head that lacks eyes but has a wide, tooth-filled grin. Its overall body structure should evoke a predatory, nightmarish aesthetic.