Because of his plans, Zhou Tian had not only secretly killed a large number of monsters during his previous fights with the 'Aliens', but he had also done something else at that time.
During the melee between the monster forces and the 'Alien' army, Zhou Tian had secretly frozen a few 'facehuggers' and hid them away.
The original plan was to see if he could use those facehuggers to find a way to control the 'Aliens'. If successful, given the nature of the 'Aliens', these few facehuggers would be enough to create an 'Alien' army. Even if Zhou Tian eventually failed, there would be no loss to him because, as long as he did not provide those 'Aliens' with a chance to grow, even if they were brought to the main plane, he would definitely have the ability to eliminate them before they became a disaster.
