Conquer the tower.

As he had thought, it was the same, once his world fails to climb the tower, it's gonna become a slave to the tower.

'So, if we fail, everyone who is on our world becomes a slave?'

[Correct host. Those who are in your world once the timer ends will become slaves to the tower.]

After listening to all this information, he realized how these monsters came inside the tower and dungeons, but one thing remains answered, and that is... why?

'But why was this tower made? If it enslaves the natives of a world if they can't climb the tower then it cannot be good, right? What was the motive behind creating this tower?'

[A motive... I can't say for sure, but it must be to root out the defective and make those who are adept stronger.]

'Only the strong and more worthy can live, all of the rest are just livestock who can only get butchered.'

[Unfortunately, that is true host.]