<diacritize> Each person carries hisher own bane around with himher. Compare Idi niku igbin . . . Customarily, the tortoise is killed by pulling its neck and rubbing it against the sharp edge of its shell behind the neck until it comes apart. That part of the shell is known as the tortoises sword. <yor>Each person carries hisher own bane around with himher. Compare Ìdí nikú ìgbín . . . Customarily, the tortoise is killed by pulling its neck and rubbing it against the sharp edge of its shell behind the neck until it comes apart. That part of the shell is known as the tortoises sword. 