Aria Lieze, Chrono Harlaown and others in “Destiny”

Chrono, look, it's not too late just yet! Set us free while we still have time. The only time we can freeze the Book of Darkness is within a few minutes after it goes out of control!

But until that point is reached, the owner of the Book is not yet considered some criminal who needs to be sealed away forever. That would be illegal.

And because of that...! Because of that law, that tragedy has been repeated over and over again! That's why Clyde was... That's why your own father had to go away and-

That's enough.

The law aside, there is a problem with your plan. First of all, the removal of the freeze would not be that hard. No matter where you hide it or how well you protect it, someone will try to find it, and try to use it. Anger and sadness, greed and desire, those are the kinds of wishes that can lead one to the sealed power.