But the genes of the alien invaders are not easy to obtain.
So, it resorted to a risky method. If there were none, it would just take them by force.
It secretly kidnapped many new-generation alien invaders and conducted various experiments on them.
The number of alien invaders has multiplied many times compared to a thousand years ago, and the adult individuals colonizing Earth have less contact with each other.
Because after a millennium, each has their own territory, fulfilling their mining duties. The distances between crystal blocks are relatively large, and Earth's environment is extremely harsh for them. Generally, no one would visit aimlessly, and they stay within their small groups.
The creature specifically targeted these smaller groups for kidnapping, one group at a time, leaving none behind.
