Inspired by the predation process of insectivorous plant Dionaea muscipula, a new type of carbon-based adsorbent was developed and reported in this work. This adsorbent, being of bubble-like morphology, was obtained by a facile solid state reaction. The existence of cementite phase endowed these carbon bubbles with ferromagnetic properties, and therefore leading to its quick magnetic response as a magnetic field was applied or removed. As an adsorbent for both organic and inorganic pollutants, the thin wall of the carbon bubble could not bear the ever-increasing compressive stress coming from the enwall-adsorbed pollutants, so that the carbon bubble was buckled into a closed carbon cage to isolate the adsorbed pollutant from water. By using this manmade "Dionaea muscipula" in water treatment, the maximum adsorption capacities of erichrome black T, bromophenol blue (BPB), bromocresol green (BCG), fluorescein (FLU), As5+ and Cr6+ ions amounted to 2105, 1899, 2007, 1976, 474, and 503 mg g(-1), respectively. Such high adsorption capacities for both organic and inorganic pollutants together with their excellent regeneration efficiencies above 95% were highly desirable for its widespread applications in water treatment.