While technically alive, magnagogs have little in the way of personality and are driven via telepathic command.
Most folk would call an argillomatus a clay golem. They would be wrong.
What if the sources of precious metal in the realm all failed, so that the only sources for gold and other precious metal were hostile foreign lands? Gold coinage might become increasingly rare, resulting in hoarding. Player characters that appear with masses of treasure might be suspected of being in the pay of foreign powers.