As a non-contact, real-time, accurate, and flexible control technique, the magnetic field has been widely utilized in a variety of applications, including industrial grab, robot drives, medical assistance, etc. However, non-magnetic phase change materials (PCMs) are difficult to manipulate with magnetic fields. Recently in <i>Nature Communications</i>, He et al. innovatively proposed magnetically tightened form-stable PCMs with the integrated multi-functions of being leakage-proof, having highly thermal/electrical conductivities, robust mechanical strength, dynamic assembly, and shape reconfiguration by introducing hard magnetic particles. Additionally, they developed free-standing temperature control and high-performance thermoelectric conversion systems based on magnetically tightened form-stable PCMs.