The secrets of the Tower of Dark Enigma, Hill can temporarily set aside: even though Ruth is clearly up to something, he certainly isn't on the side of the devils.
As for what might be hidden in the dark, Hill actually doesn't care much... it's just some means of struggling for the future.
No matter how much sorrow and pain, anger and hatred are hidden in these means, to Hill, it is just a story that evokes sighs, not something he must delve into to uncover all the hidden truths.
Just like Teraxil's struggles and resistance over tens of thousands of years, to people in other worlds, it's just a history book... something to read and ponder, but not to delve into who are the figures behind the joys and sorrows of history.
Anyway, the stronger the hidden powers are in this world, the happier Hill will be.
As for whether the Styx will also feel happy, or whether the Red Dragon and his daughter have any means to fully control this world... what does it have to do with Hill?
