Any entity that resides in the massless realm has no power when it comes to our massy realm. This is easily shown by E=mc^2 when mass is zero yielding energy is zero. Then, P = E/t (power is energy over time) with E being zero from first equation yields power of zero. Thus, a massless god has no power in a massy universe. He needs to get his mass over here to be able to do anything.