ConceptSheet by Jean-Claude Mézières: A document showing a boomerang spinoff: coming from Valerian and Laureline this one is a deadly piece of weaponry ; it is used mainly by the sketches thrown up to 30 mph to decapitate even the strongest biggest enemy and also it brings back the head for a trophy

statue, doubles, twins, entangled fingers, Worst Quality, ugly, ugly face, watermarks, undetailed, unrealistic, double limbs, worst hands, worst body, Disfigured, double, twin, dialog, book, multiple fingers, deformed, deformity, ugliness, poorly drawn face, extra_limb, extra limbs, bad hands, wrong hands, poorly drawn hands, messy drawing, cropped head, bad anatomy, lowres, extra digit, fewer digit, worst quality, low quality, jpeg artifacts, watermark, missing fingers, cropped, poorly drawn