Vok

The Vok were the mysterious energy-based alien creatures who had performed experiments with Energon Crystals on the Earth. As a result of these experiments, there were a number of anomalies on the Eartg, including several floating landmasses, a mysterious stone formation (stone henge), and a hollowed-out moon.

Their experiments were irreperably wrecked as a result of the Beast Wars. The Vok decided to cut their losses by revealing the nature of the second moon: An immense cannon designed to destroy the planet!