She lost her arm
The village of those humanoid dogs was not that small.
Thus, Reigner had to go through a few rounds just to kick away everyone. It meant that he killed more, but other than fast and overbearing killing, what else could make those humans go away from this place?
Though it was also a little hypocritical of Reigner, he found the change of earthlings to be rather too excessive. Those people were killing those humanoid dogs without any scruples and found their cries laughable.
This was because Reigner had been seeking the normal environment all this time.
And after seeing those earthlings just killing and killing in the dungeon, he realized that not only the world has been changing, but the earthlings themselves were becoming more reliant on their strength.
As the time goes, people will totally turn to be drunk with power. The strong aura will replace the 'status,' and only this would be enough to stop those people.