Jar of silt

Looking quite ordinary, if somewhat magic-endowed, an artefact jar of silt, once attuned to a continental (Sapient or Meropian) harbour, will cause subsequent uses of a token of Charybdis to return the owner to their chosen harbour, rather than Tasur'ke like the tokens do for poorer seafarers. The jar is sold at the Shop of Wonders and its attunement and disattunement are attained (once per month) with a simple shake of the sand-containing vessel..