The Vahki Squadron of Skrall were originally an average Vahki troop sent by Turaga Dume to the island as protection against evil. Where after a couple of years, the squadron in question encountered a bounty Hunter named Gavlin who was convicted of manslaughter, mishandling of the general population, First, second and third degree murders, betrayal and a long list of other convictions. And Gavlin, being the manipulative Toa he was, "persuaded" the squadron to help him out. The Squadron had no choice and complied as they were -after all- against one of the most vicious bounty hunters in the land. Now with a powerful army alongside him, Gavla set off to Metru Nui, where he was responsible for destroying half of the island. As well as the murder of Turaga Dume and the Toa Metru.