When done with exploration, the adventurer would use the cube and its disc in accomplishing his return -- and sometimes the captured mind would be restored safely to its own remote world. Not always, however, was the dominant race so kind. Sometimes, when a potentially important race capable of space travel was found, the worm-like folk would employ the cube to capture and annihilate minds by the thousands, and would extirpate the race for diplomatic reasons -- using the exploring minds as agents of destruction.