For Orsaga.
The book Abyss Demon of All Realms, along with other means of spreading information originating from observers.
Such as religious sacred texts edited by people, or mythological tales that merely repackaged the same old stories...
Their greatest use, aside from giving him a natural way to obtain more spacetime coordinates.
Was to provide him with another means of glimpsing the future from afar.
In the Multiverse.
Because time flowed at different rates.
And because of numerous additional factors.
Many different futures continuously projected fragments of information into the past and present.
Thus allowing the future to influence the past and present.
Conversely.
Events in the present and past also emitted fragments of information, thereby influencing the future.
As such, the books written by various observers occasionally contained glimpses, to varying degrees, of scenes that were highly likely to occur in the future.
This made them something akin to books of prophecy, potentially containing information useful to Orsaga.
This phenomenon also manifested in different ways in Abyss Demon of All Realms.
For instance, despite being the same book, its plot differed slightly across different spacetime settings. Some authors had only written the beginning, before the story had even unfolded, while others had long since finished it successfully, bringing the story to a close...
Amid all those different developments.
Orsaga could sometimes use his own power to connect with infinite future possibilities and catch a narrow glimpse of important information about the future.
However.
Even so, their usefulness ultimately remained rather limited...
Because once their contents were translated into reality, all manner of external interference would prevent events from unfolding as expected, sending their course veering in who knew what direction...
For example, after learning of an excellent outcome, you might try to achieve it.
But others would not necessarily