Unicron survives but is crippled and no longer has the power to transform or even move. He is forced to employ servants to do his own bidding: Alpha Q and the Terrorcons, who are disgruntled former Decepticons upgraded by Unicron in return for harvesting enough Energon to repower him. While they attack Earth, a rich source of Energon, Unicron sends his four Horsemen - Rhinox, Airazor, Terrorsaur and Cheetor, absorbed by Unicron in the previous battle - against Cybertron, devastating much of it before Optimus Prime stops them. Many of the latter Energon stories are set inside Unicron himself as Megatron, whose Spark also survived the previous battle, attempts to convince Prime to resurrect him in a new body, with the planet eater seemingly unaware of their actions.