Antimony-based 0-dimensional metal halides (0D-MHs) are attracting attention owing to their bright Stokes-shifted luminescence due to self-trapped excitons (STEs). One unexplored motif to expand their functionalities is to dope them with optically and/or magnetically active dopants that participate in energy-transfer schemes involving STEs. We investigated the photophysical and magnetic properties of Rb7Sb3Cl16 nanocrystals doped with Mn2+ ions, which introduce strong magnetism and activate their characteristic intra-d luminescence. By controlling the doping level, we optimize the STE → Mn2+ energy transfer and tune the magnetic character of the NCs. Particles lightly doped with isolated Mn2+ centers exhibit paramagnetic character and temperature-independent luminescence. By contrast, highly doped NCs show a clear transition to antiferromagnetic behavior at cryogenic temperatures similar to the …