The Eight Legs were black spiders, generally less then a metre in length, though the Great One achieved a much larger size. The Eight Legs relied on Human mounts for transport, though they could scuttle along at walking pace. The Eight Legs could create webs like the spiders of Earth, though they were not sticky and were merely tough. They also fed on the flesh of living creatures, generally the sheep of Metebelis III, though they preferred Human meat.

The Eight Legs could speak through telepathy, discharge psychic energy and teleport through both time and space. To teleport further distances required more spiders to focus their wills. They could ride on the backs of Humans, turn invisible and possess the Human who could act as a vessel for the Eight Leg's power. They could, for example, project psychic energy blasts, the strength of which varied according to the strength of the victim. (