They wished to exterminate humanity and all of the other races, who they viewed as inferior and undeserving of life. However, they were unable to produce enough offspring to mount such an attack. Their birth rate being the lowest of any sentient species in that area of the galaxy, they decided to use genetically modified human embryos to create Pitar fetuses.
They desired to annihilate humanity and all other races, which they considered inferior and unworthy of existence. However, they were unable to produce enough offspring to launch such an attack. Their birth rate being the lowest among sentient species in that galaxy region, they opted to use genetically modified human embryos to create Pitar fetuses.