Magic Soil is a bioengineered material created from water treatment residuals, dredged sediment, and excavated soil, stabilised with a synthetic enzyme inspired by termite saliva. It replaces costly drainage infrastructure by serving as a high-performance bioretention medium for flood control, while also removing microplastics and pollutants from water. Its efficient dewatering process reduces energy use and cost. Designed for urban and ecological restoration, it offers scalable, low-cost environmental solutions suitable for low-resource settings