Giisulto (Sigma)
One of the twin terrors of the Australian outback, Giisulto Sigma is an unusually eager hunter for a Vastator. This is in one part possibly due to its youth by Vastator standards (a million or less years old) and due to a lack of resources for it to feed upon. In the old days Sigma was joined by four other siblings, a deadly pack who would harass any Vastators entering their territory. They would attract prey with thermal lures lining their abdomens and parasitically latch on to eat up their prey's mineral exoskeleton and drink any fluids/gases. A drill like stinger would spin back and forth to get through the tough armor. This often lead to such Vastators to leave the country to resupply lost materials. Over time no more Vastators visited Australia, so the Giisultos grew hungry, until they hunted each other, leading to the Sydney Slaughter. Now the two remaining Giisultos, Sigma and Gamma, hunt smaller prey, especially humans in large groups or in vehicles.
Based on a design for my No Longer Man’s project by @yousadclownofaman