A mask made of ground human skulls.  They are said to have been in use due to the belief that wearing the mask made of ground human skulls would grant the wearer the wisdom.  Therefore, the more the masks, the more the Togui would be praised as a wise one, soon to become the next chief to leave the Toguis.  This is perhaps the reason why many headless corpses in a region where Toguis are very active in their pillaging.  It is also said that there are always conflicts big and small among the Toguis themselves to seize one anothers masks.